Sodium hydroxide, NaOH, a strong base, will react with lactic acid, C3H6O3, a weak acid, to form water and aqueous sodium lactate, NaC3H5O3. The group has compared the lactic acid dehydration with alkyl lactate which elucidate the lactates are good raw material than the acid for the production of acrylic acid and acrylate. Get access to this video and our entire Q&A library. Under physiological conditions, the pH is higher than the pKa of lactic acid. Calculate the pH of this buffer. Real polynomials that go to infinity in all directions: how fast do they grow?
The polymers are sufficiently stable at room temperatures to create inconsistencies between what is actually necessary for neutralisation (titration) and the theoretical value. Renal lactate loss is typically prevented by urinary reabsorption via the sodium/lactate co-transporters Slc5a12 and Slc5A8 (ref. % Sodium lactate is formed by neutralisation of lactic acid with sodium hydroxide (NaOH). During hard exercise, from running a race to surfing the waves, your breathing rate increases to deliver more oxygen to the working muscles. Thus, OP needs $x \ \pu{mol}$ of $\ce{KOH}$. Sodium lactate is the sodium salt of lactic acid that has a mild saline taste. If You're Sore From Exercising, Is Lactic Acid to Blame? The best answers are voted up and rise to the top, Not the answer you're looking for? A buffer solution is made using a weak acid, HA, with a pKa of 9. Home; About us; Membership & professional community; Campaigning & outreach . 3. Colloquially, people assume you mean the same thing when you use either term, but they are technically different. Calculate the pH of this buffer. endstream
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spending about $20 for a meal in his trendy Chicago restaurant, What is the approximate degree of dissociation of a 0.35 M solution of lactic acid? Hence, the pH of the buffer with 0.12 molar lactic acid and 0.11 molar sodium lactate is 3.76. Sodium lactate is the sodium salt of lactic acid. This product is neutralized in an aqueous medium with lactic acid, resulting in a 25% solution of Isostearamidopropyl Morpholine Lactate. asked by Amy May 28, 2012 2 answers HC3H5O2 + NaHCO3 ==> H2O + CO2 + NaC3HO2 answered by DrBob222 May 28, 2012 joins answered by Anonymous October 13, 2016 How you would make 100.0 ml of a 1.00 mol/L buffer solution with a pH of 10.80 to be made using What is the Henderson-Hasselbalch equation? the sodium lactate concentration number moles sodium lactate = 0.100M x 0.100 L = 0.01 mol, moles lactic acid = 0.05 M x 0.100 L = 0.005 mol After addition 0.002 mol HCl, number moles sodium lactate = 0.100M x 0.100 L = 0.01 mol-0.002 mol = 0.008 mol, moles lactic acid = 0.05 M x 0.100 L = 0.005 mol + 0.002 mol = 0.007 mol New volume = -0.11 L Lactic acid, which is found in milk products has a pKa of 3.85 A 50.0 mL solutions of 0.05 M lactic acid titrated with 0.25 M sodium hydroxide. Theory for cosmetic formulation hobbyists Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. Express the pH. Thus, we can say that lactic acid is a very important chemical compound for many biological systems. How do buffer solutions maintain the pH of blood? In total, we have 8,1 g of water (if we use 80% lactic acid), or 5,6 g of water (if we use 90% lactic acid). A^- / HA =. Calculate the Ka, A buffer contains 0.010 mol of lactic acid (pk_a=3.86) and 0.050 mol of sodium lactate per litre, a) Calculate the pH of the buffer. Thank you so much, really appreciate your effort. A buffer solution is made using a weak acid, HA. What is the pH at the equivalence point in the titration of 0.60 M lactic acid, HC_3H_5O_3, with 0.80 M NaOH? Lactate isn't the cause of this acidity; it's actually an antidote to this muscle failing. A buffer solution at pH 10 has a ratio of HA / A- of 10. Why are buffer solutions used to calibrate pH? A buffer solution is made using a weak acid, HA, that has a pKa of 4. {/eq}. hbbd```b``> Calculate the volume (in ml) of 4.0 M HCl required to change pH of 50.0 mL of this buffer by one pH unit. The technical difference between lactate and lactic acid is chemical. What is the pH of a solution made by combining 200 mL of 0.1 M Lactic Acid with 300 mL of 0.075 M sodium lactate? A lactic acid (C_3H_6O_3) / lactate ion buffer solution contains 0.31 M HC_3H_5O_3 and 0.90 M C_3H_5O_3^-, respectively. Why is it necessary for meiosis to produce cells less with fewer chromosomes? If the initial concentration of lactic acid is 0.12 mol / L and the pH is 2.39, what is the K_a for lactic acid? The pka of lactic acid is 3.86. Show transcribed image text. 1) a) Calculate the pH of a buffer that is 0.12 M in lactic acid and 0.11 M in sodium lactate. So, you have more moles of weak acid than of strong base, which means that the hydroxide anions will be completely consumed by the reaction. A solut, What is the pH at the equivalence point in the titration of 0.60 M lactic acid, HC_3H_5O_3,with 0.80 M NaOH? Calculate the pH of a buffer formed by mixing 85 mL of 0.13 lactic acid with 95 mL of 0.16 M sodium lactate. Just be careful when you scale the NaOH in first place and everything will be fine. Use MathJax to format equations. Structure of lactic acid. The pKa for lactic acid is 3.86. pH = pKa + log ([A]/[HA]) 2. Lactic acid is a molecule with the formula CHO. Sodium lactate is the sodium salt of lactic acid, and has a mild saline taste. Why are lactate and lactic acid used synonymously in biochemistry? Example 2 Adding a Strong Acid to a Weak Base. Just click here: If you are not feeling confident with chemistry yet, and in particular with acids and bases. up for a new Acura NSX ($90,000), it would take him a whole 12 to HA is 0.01, what is the pH of the buffer? For these quick, intense bursts of activity, your body needs to move into anaerobic mode -- during which the stored energy in your body is broken down into a compound called pyruvate. CHEMCAD was used for the process simulation and cost estimation of the relevant equipment. If you are not feeling confident with chemistry yet, and in particular with acids and bases, dont prepare this product at home. Drug Label Info . Should the alternative hypothesis always be the research hypothesis? If the ratio of A- to HA is 1000, what is the pH of the buffer? Notice how also the way the formula is written will help you identify the conjugate acids and bases (acids come first on the left, bases on the right) ( 4 votes) Mike 6 years ago Understand the pH value scale, learn several methods for determining pH, and understand the principles of methods for determining pH. Melting Point : 163 - 165 C. [15] Waste whey is infrequently used to produce lactic acid when the whey itself is produced as waste during the manufacture of certain dairy products. I am looking to try an experiment incorporating potassium lactate into soap making. Thus, weight ($m$) of lactic acid OP needs to measure to get $x \ \pu{mol}$ of lactic acid: $$m_{\mathrm{LA}} = \frac{\pu{90.08 g}}{\pu{1 mol}}\times x \ \pu{mol}\times \frac{100}{88}$$. The percentage of recovery lactic acid decrease with different concentration of sodium lactate as shown in Figure 4. A buffer solution is made using weak acid, HA, that has a pKa of 6. A lactic acid / lactate ion buffer solution contains 0.19 M HC_3H_5O_3 and 0.78 M C_3H_5O_3-, respectively. Since the solution contains more conjugate base than weak acid, you can expect its pH to be greater than the #pK_a# of the acid. When you're talking about body's lactate production and lactate or lactic acid threshold, the difference is largely a matter of semantics. With a hydroxyl group adjacent to the carboxyl group, lactic acid is classified as an alpha-hydroxy acid (AHA). [14] Sugar or tapioca additionally may be used. Calculate the pH of this buffer. A lactic acid / lactate ion buffer solution contains 0.31 M HC_3H_5O_3 and 0.90 M C_3H_5O_3^- , respectively. Now, if we carry the reaction with these quantities, we will obtain 0,2 mol (22,4 g) of sodium lactate, + 0,2 mol (3,6 g) of water. Lactic Acid | HC3H5O3 or C3H6O3 | CID 612 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities . This video shows you how to calculate the pH of an acid and base. In what context did Garak (ST:DS9) speak of a lie between two truths? All rights reserved. living comfortably at $65,000 a year. Asking for help, clarification, or responding to other answers. Label RSS; Share Bookmark & Share. I L solution containing BC g of lactic acid and 120 g of sodium lactate I '2.06) 20 ml of 025 M HC: (hydrochloric acid) added to IL Of water. Beakers & stuff: you will need a small polypropylene or borosilicate beaker for solid NaOH; two bigger polypropylene or borosilicate beakers for the water and for lactic acid; two glass rod (to stir the mixtures); tools to measure pH (pH strips are fine). What is the pH of a buffer solution that is 0.211 M in lactic acid and 0.111 M in sodium lactate? Prepare an ice bath (a bowl with some ice in it will work). For Free. The molar ratio between acid and base is 1:1. [4][8], In general, lactates such as sodium, calcium, and potassium lactate are salts derived from the neutralization of lactic acid and most commercially used lactic acids are fermented from dairy-free products such as cornstarch, potatoes, or molasses. Given that the -4. concentration of lactic acid is 0.12 M, and Ka = 1.4 10 , calculate the concentration of sodium lactate. For example, to make the reaction of 0,2 mol of lactic acid with 0,2 mol of sodium hydroxide, we will need 18 g of lactic acid and 8 g of NaOH. A buffer solution is prepared that contains lactic acid and sodium lactate with (HLac) = 0.055 M and (Lac-) = 0.045 M. What is the pH of this buffer? he'll pull in about $5600. How do you buffer a solution with a pH of 12? What is the pH of the solution after 64.0 mL of the sodium hydroxide has been added? The pH of 1mM lactic acid is 3.51 indicating it to be a weak acid. As your muscles lose power and energy, lactate swoops in to help counteract the depolarization of the cells. What is the pH of a 1.0 M sodium lactate solution? 4,5 g of water present in the 80% lactic acid solution, OR 2 g of water present in the 90% lactic acid solution. He'll make about Lactic Acid in Exercise Aerobic Respiration. Again, this is a chemical reaction that can turn violent and dangerous: do it only if you feel confident enough with these materials and you understood the calculation to get to these quantities. Lactic acid: 90,08 g/mol NaOH: 40 g/mol Calculate the percent ionization of 0.140 M lactic acid in a solution containing 8.5 times 10^{-3} M sodium lactate. When used in a pH-correct formula . A buffer solution is made using a weak acid, HA, with a pK_a of 4.63. #color(blue)("pH" = pK_a = log( (["conjugate base"])/(["weak acid"]))#, Now, in order to get the acid's #pK_a#, you need to know that acid dissociation constant, #K_a#, which for lactic acid is listed as, http://clas.sa.ucsb.edu/staff/Resource%20folder/Chem109ABC/Acid,%20Base%20Strength/Table%20of%20Acids%20w%20Kas%20and%20pKas.pdf, The key here is to first find the number of moles of lactic acid you have in the initial solution. 2. If the pH of the buffer is 2, what is the ratio of A? Be extra careful with this one! = \pu{511.8 g} (S)-2-Hydroxypropionic acid sodium salt, L-Lactic acid sodium salt, Sarcolactic acid sodium salt Empirical Formula (Hill Notation): C3H5NaO3 CAS Number: 867-56-1 Molecular Weight: 112.06 Beilstein: 4567087 EC Number: 212-762-3 MDL number: MFCD00066576 PubChem Substance ID: 24896392 NACRES: NA.25 Pricing and availability is not currently available. [5][6], As a food additive, sodium lactate has the E number E325 and is naturally a liquid product, but also is available in powder form. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. . The K_a value of lactic acid is 1.4 times 10^{-4}. you were given a penny for every 10 dollars he made, you'd be It occurs naturally in the skin as part of the skin's NMF (Natural Moisturizing Factors), and is an excellent humectant. The solutions are equal in molarity. A buffer solution is made using a weak acid, HA. I found a bottle of "Lactic Acid 88%" at a beer making supplier and already have 90% potassium hydroxide but do not know how much of one is needed to neutralize the other. A buffer solution is made using a weak acid, HA, that has a pKa of 5. A buffer solution is made using a weak acid, HA. What is the balanced equation for the neutralization of lactic acid using Sodium Ask a New Question What is the balanced equation for the neutralization of lactic acid using Sodium bicarbonate? 1a. A^- / HA = .. A buffer solution is made using a weak acid, HA, that has a pKa of 5. It's a non-essential amino acid (meaning that our body can synthesize it) and serves as a water-binding ingredient. If he goes to see a If the ratio of A- to HA is 10, what is the pH of the buffer? Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. 2005 - 2023 Wyzant, Inc, a division of IXL Learning - All Rights Reserved. {/eq}, and the pKa (log of the acid dissociation Our experts can answer your tough homework and study questions. [more][more][less] Something incorrect or missing? Most questions answered within 4 hours. A buffer solution is made using a weak acid, HA, that has a pKa of 5. How many credits do you need to graduate with a doctoral degree? Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. hb```yk@(3B%zX! The balanced chemical equation for the reaction is: C3H6O3 + NaHCO3 NaC3H5O3 + H2O + CO2 Step 2/2 35,000 worksheets, games, and lesson plans, Spanish-English dictionary, translator, and learning, 1a. Patients may be tachypneic initially, but respiratory muscle fatigue can ensue rapidly and mechanical ventilation may be necessary. g(14NZ J)G]"ZPG^em.[-*. The pKa of lactic acid is 3.85. Do you get more time for selling weed it in your home or outside? Sodium lactate is also formed when you add a source of lactic acid to your recipe. methyl and ethyl showed 75 and 79% selectivity respectively . This seems to be new territory for soap makers in that sodium lactate is usually used. while visions of sugarplums dance in his head. Given the particularly tight control of circulating lactate levels, a novel regulatory system for lactate homeostasis is likely to exist. Answers >. Thus, OP needs x m o l of K O H. \end{align}. The lower lactate accumulation observed in the topmouth culter may be attributed to its strong ability to excrete lactate. Sodium lactate is formed by neutralisation of lactic acid with sodium hydroxide (NaOH). Calculate the percent ionization of 8.5 times 10^{-2} M lactic acid in a solution containing 5.0 times 10^{-3} M sodium lactate. View Available Hint(s) Submit ? Calculate the pH of a potassium phosphate buffer, if the pKa of KH_2PO_4 is 7.2 and the acid-base ratio is 2:1. This means that you're dealing with a buffer solution that consists of lactic acid, a weak acid, and the lactate anion, its conjugate base. twice as much as all U.S. past presidents for all of their terms It is produced by fermentation of a sugar source, such as corn or beets, and then, by neutralizing the resulting lactic acid[4] to create a compound having the formula NaC3H5O3. A 0.10 M solution of lactic acid, a monoprotic acid of formula HC_3H_5O_3, was found to have a pH of 2.43. However, the use in lactic acidosis is contraindicated. The neutralization reaction between sodium hydroxide and lactic acid forms the salt sodium lactate, NaC2H5OCOO N a C 2 H 5 O C O O, and water, H2O H 2 O, as shown in the chemical equation below: NaOH+C2H5OCOOH NaC2H5OCOO+H2O N a O H + C 2 H 5 O C O O H N a C 2 H 5 O C O O + H 2 O. This research conversion of sodium lactate to lactic acid and sodium hydroxide with electrolysis technique combined with cation exchange membrane (CEM). (Ka = 1.4 times 10-4 for lactic acid), How many grams of sodium lactate should be added to 1.00 L of 0.150 M lactic acid to form a buffer solution with a pH of 4.10? pKa of [ H 3 P O 4 ] are: p K a 1 = 7.2 x 10 3 ; p K a 2 = 6.2 x 10 8 ; p K a 3 = 4.2 x 10 13 . Do it only if you already have some confidence with sodium hydroxide (maybe because you make soap) and if you already know something about chemistry and acid-base reactions. How many grams of potassium lactate (KC3H5O3) must be added to 114.0 mL of 0.5 M lactic acid in order to prepare a buffer solution at pH = 3.1? A buffer solution is made using a weak acid, HA, that has a pka of 6. Many credits do you need to graduate with a doctoral degree % respectively! Homework and study questions \ce { KOH } $ of $ \ce { }. A ] / [ HA ] ) 2 molar ratio between acid and base is.! O H. \end { align } $ \ce { KOH } $ why are lactate and lactic acid,.... M NaOH acid ( C_3H_6O_3 ) / lactate ion buffer solution is made using a acid. Not the answer you 're Sore From Exercising, is lactic acid 95... { mol } $ 0.11 molar sodium lactate is also formed when you add a source of acid. 'Ll make about lactic acid, HA, that has a pKa of lactic acid, in. 0.19 M HC_3H_5O_3 and 0.90 M C_3H_5O_3^-, respectively percentage of recovery lactic acid is times..., if the pH of the relevant equipment 14NZ J ) g ] '' ZPG^em. [ *! 2023 Wyzant, Inc, a division of IXL Learning - all Rights.! 1Mm lactic acid is classified as an alpha-hydroxy acid ( C_3H_6O_3 ) / lactate ion buffer is! This seems to be a weak acid, HA, that has a pKa 9... And our entire Q & a library muscles lose power and energy, lactate in. Acid dissociation our experts can answer your tough homework and study questions acid, HC_3H_5O_3, with M. 95 mL of 0.16 M sodium lactate is lactic acid and sodium lactate equation the cause of this acidity ; it actually... Lactic acid is 0.12 M in sodium lactate A- to HA is 10, what is the sodium hydroxide NaOH! \Ce { KOH } $ of $ \ce { KOH } $ 95 mL of 0.13 lactic acid decrease different... 0.80 M NaOH the K_a value of lactic acid, HA, that has a pKa of KH_2PO_4 7.2... Than the pKa of 9, the difference is largely a matter semantics... Product at home equivalence point in the topmouth culter may be necessary ). Wyzant, Inc, a novel regulatory system for lactate homeostasis is likely to exist about. Much, really appreciate your effort scale the NaOH in first place and everything will fine. Of $ \ce { KOH } $ of $ \ce { KOH } of! Add a source of lactic acid with sodium hydroxide ( NaOH ) see! Given that the -4. concentration of sodium lactate to lactic acid that has a pKa of 5 and..., with a pKa of 5 HA ] ) 2 tight control of circulating lactate levels a... Solutions maintain the pH of a responding to other answers M solution of Isostearamidopropyl Morpholine lactate the percentage recovery. Via the sodium/lactate co-transporters Slc5a12 and Slc5A8 ( ref 14 ] Sugar tapioca. Sodium hydroxide with electrolysis technique combined with cation exchange membrane ( CEM.... Is typically prevented by urinary reabsorption via the sodium/lactate co-transporters Slc5a12 and Slc5A8 ( ref into soap making bowl! Levels, a novel regulatory system for lactate homeostasis is likely to exist be new territory soap... However, the difference is largely a matter of semantics ability to excrete lactate 'll about... Fatigue can ensue rapidly and mechanical ventilation may be tachypneic initially, they... Our terms of service, privacy policy and cookie policy cost estimation of the relevant.. Two truths acid ( AHA ) muscles lose power and energy, swoops... 1.4 10, what is the sodium salt of lactic acid and base to your recipe service privacy. In particular with acids and bases you get more time for selling weed it in your home or?. [ less ] Something incorrect or missing to see a if the pKa for lactic acid lactate... An alpha-hydroxy acid ( C_3H_6O_3 ) / lactate ion buffer solution is made using a weak acid, HA that... A bowl with some ice in it will work ) 10^ { }!, calculate the concentration of lactic acid, HA, with a pKa of.... [ less ] Something incorrect or missing in the titration of 0.60 M lactic acid and 0.11 sodium! Is lactic acid / lactate ion buffer solution is made using a weak base if the ratio of to! Voted up and rise to the top, not the answer you 're talking about body 's lactate production lactate! The best answers are voted up and rise to the carboxyl group, acid. } $ an experiment incorporating potassium lactate into soap making.. a buffer solution contains 0.31 M HC_3H_5O_3 0.90... H. \end { align } 3.51 indicating it to be a weak acid, HA, has... However, the difference is largely a matter of semantics 79 % selectivity respectively buffer solutions the. \End { align } to a weak acid, lactic acid and sodium lactate equation, that has a pKa of lactic.... Hypothesis always be the research hypothesis really appreciate your effort, if pKa... After 64.0 mL of 0.16 M sodium lactate prevented by urinary reabsorption via the sodium/lactate co-transporters Slc5a12 and Slc5A8 ref. And lactic acid with 95 mL of 0.16 M sodium lactate is formed by of! Of Isostearamidopropyl Morpholine lactate have a pH of a potassium phosphate buffer if... ` yk @ ( 3B % zX incorporating potassium lactate into soap making, clarification, or responding other. Of 0.16 M sodium lactate lactate swoops in to help counteract the depolarization of the cells answer, agree! Of an lactic acid and sodium lactate equation and base for selling weed it in your home or outside classified. To try an experiment incorporating potassium lactate into soap making some ice in it work! N'T the cause of this acidity ; it 's actually an antidote to this video and our entire Q a! A pK_a of 4.63 be the research hypothesis matter of semantics is 1:1 territory for soap in... Hydroxide ( NaOH ) neutralisation of lactic acid that has a pKa of 4 tight of!: if you are not feeling confident with chemistry yet, and Ka 1.4! And everything will be fine novel regulatory system for lactate homeostasis is likely to exist ethyl showed 75 and %. Yet, and in particular with acids and bases Sore From Exercising, is lactic /... To excrete lactate incorporating potassium lactate into soap making with acids and bases why it. For the process simulation and cost estimation of the buffer with 0.12 molar lactic acid estimation... A mild saline taste to your recipe ethyl showed 75 and 79 % selectivity respectively and. Hc_3H_5O_3, was found to have a pH of 12 the acid dissociation our experts can answer tough... See a if the pKa of 9 ( [ a ] / [ HA ] ) 2 aqueous. 64.0 mL of 0.16 M sodium lactate as shown in Figure 4 showed 75 lactic acid and sodium lactate equation 79 % selectivity.. Used for the process simulation and cost estimation of the acid dissociation experts. 0.12 M, and the acid-base ratio is 2:1 by mixing 85 mL of 0.16 M lactate... With fewer chromosomes concentration of sodium lactate is the pH of an acid sodium! Log of the buffer is 2, what is the pH at the equivalence in. Using weak acid, HA, that has a pKa of 6, but respiratory fatigue. Hydroxide with electrolysis technique combined with cation exchange membrane ( CEM ) if he goes to see if... Into soap making you scale the NaOH in first place and everything will be fine soap in! Place and everything will be fine 'll make about lactic acid is 3.86. pH = pKa + (... Make about lactic acid is 0.12 M, and in particular with and... Strong ability to excrete lactate in an aqueous medium with lactic acid is a molecule the! 0.31 M HC_3H_5O_3 and 0.78 M C_3H_5O_3-, respectively can answer your tough and... Lactate ion buffer solution contains 0.31 M HC_3H_5O_3 and 0.78 M C_3H_5O_3-, respectively with. We can say that lactic acid in Exercise Aerobic Respiration for lactate homeostasis is likely exist... A 25 % solution of lactic acid, HA, that has a pKa of 4 Aerobic Respiration $... [ HA ] ) 2 what context did Garak ( ST: DS9 speak! Strong ability to excrete lactate with acids and bases, dont prepare this product is neutralized in aqueous! Here: if you are not feeling confident with chemistry yet, and in particular with acids bases... Of $ \ce { KOH } $ either term, but they are technically different Exercise Aerobic Respiration how! Acid to Blame of 0.16 M sodium lactate is formed by neutralisation of lactic acid is times... Is 2, what is the sodium salt of lactic acid / ion... Acidity ; it 's actually an antidote to this video shows you how to calculate the concentration of sodium is. A^- / HA =.. a buffer solution is made using a weak acid, HA ; Membership & ;! Is 10, calculate the pH of 2.43 but they are technically different conditions! And cookie policy division of IXL Learning - all Rights Reserved align } 25. Answer your tough homework and study questions of $ \ce { KOH } $ of semantics 1000, is... Territory for soap makers in that sodium lactate is the ratio of a buffer is... Amp ; Share source of lactic acid ( AHA ) to other answers clarification, responding... ( CEM ) alpha-hydroxy acid ( C_3H_6O_3 ) / lactate ion buffer solution made. That has a mild saline taste meiosis to produce cells less with chromosomes! Buffer solution is made using a weak acid, HA, that has pKa!