If you prepare a best buffer with pH 3.5, which of the following compounds you will use?   a.   Na2HPO4/ NaH2PO4 (pKa: 6.8)   b. lactose (pKa: 12.39) c. acetic acid/sodium acetate (pKa: 4.76) d. phosphoric acid/sodium phosphate (pKa: 2.12) e. formic acid/sodium formate (pKa: 3.77)

Q: 40. If you add 8.0 mL of 0.10 M HCl to 25 mL lactic acid/lactate buffer that is 0.10 M lactic acid…

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Q: Acetic acid has a K, of 1.8 × 10-5. Three acetic acid/acetate buffer solutions, A, B, and C, were…

A: Since the pH of monoprotic acid buffer is given by Henderson-Hasselbalch equation as  where pKa =…

Q: What is the buffer range for a benzoic acid/sodium benzoate buffer (Ka for benzoic acid = 6.3 x 10-5…

A: Using Henderson Hesselblack equation  PH = Pka + log Salt/acid PH = -log Ka + log salt/acid

Q: Calculate the pH of 1.00 L of a buffer that contains  0.100 M  HNO2 and 0.200 M  NaNO2. What is the…

A: The solution of weak acid and its conjugate salt is known as a buffer solution (Acidic buffer). We…

Q: Which of the following concentrations of sodium acetate will produce the most effective buffer when…

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Q: Which is the best acid to use in the preparation of a buffer with pH = 9.8? A. HNO3 B. HOI (Ka = 2.0…

A: Given: Ka of HNO3 = 2.1×101 Ka of HOI = 2.0×10-11 Ka of HNO3 = 1.7×10-1 Ka of HNO3 = 4.5×10-4

Q: A chemist needs a solution buffered at pH 4.30 and can choose from the following acids: A.…

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Q: Buffer calculations: Q. Prepare 100 mL of Citrate buffer 40 mM pH 4.8 using citric acid and sodium…

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Q: Which buffer system would work best if your desired buffer pH is 4.25? O lactic acid/lactate O…

A: A buffer is a solution which resists any change in pH on adding a small amount of acid or base.It is…

Q: 11.The pKa of a weak acid was determined by measuring the pH of a solution containing the weak acid…

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Q: How would you make a buffer with pH 3.14 using HF (pKa = 3.74 for HF) Make a solution containing 4…

A: Answer :-  1. Make a solution containing 4 times more HF than NaF…

Q: Which of the following is a means of creating a buffer of H2CO3/NaHCO3? A) Mixing 10 mL of 1 M HNO,…

A: -> Buffer contain weak acid or weak base with their conjugate base or conjugate acid…

Q: what is the pH of a buffer (pka = 5.68) prepared using 0.34 moles weak acid and 0.56 moles conjugate…

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Q: Perform the calculations to prepare 100 mL of 0.02 M Phosphate buffer pH 9 using the stock solutions…

A: To prepare 100 mL of 0.02 M Phosphate buffer at pH 9 Using the stock solutions 1) 0.5 M Sodium…

Q: Calculate the pH of 1.00 L of a buffer that contains  0.115 M  HNO2 and 0.185 M  NaNO2. What is the…

A: In the given question, we have to find pH.

Q: If a buffer solution contains 2.1 M acetic acid and 2.7 M sodium acetate, what is the pH of the…

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Q: What is the pH of the buffer that results when 32 g sodium acetate (NaCH3CO2) is mixed with 500.0 mL…

A: Given, Mass of sodium acetate = 32g. Molarity of sodium acetate can be calculated as follows:

Q: A recipe for a particular buffer calls for 14.2 g anhydrous sodium phosphate (M.W. 141.96) per 1…

A: The buffer needs 14.2 g of anhydrous sodium phosphate per 1 liter of solution.

Q: When choosing an indicator for the titration of a weak acid with strong base, which of the following…

A: A weak acid does not dissociate completely and thus furnishes less H+ ions. So, it is called as a…

Q: Consider a buffer that has a free amino group (X-NH2 ) with a pKa of 8.5. If the buffer is present…

A: Henderson equation is  pOH = pKb + log [salt][base] X-NH2 is base form and X-NH3+ is acid form which…

Q: Phosphate buffers are commonly used to mimic biological systems. Given that phosphoric acid is a…

A: Step 1:Phosphate buffers are indeed commonly used in biological research and experimentation due to…

Q: Acetic acid and its conjugate base acetate can form an acid-base buffer.  The pKa of acetic acid is…

A: Given: Concentration of HNO3 = 10.0 M Concentration of acetic acid = 0.0100 M Concentration of…

Q: phosphate buffer at pH 7.5. You are out of solid versions of phosphate, but you find stock solutions…

A: Solution: Postpartic acid is tribasic basic acid (contains three protons), therefore it have three…

Q: f you want to make a buffer at pH 6.5, which buffer system would you use? a. Lactic acid (pKa =…

A: A buffer is a solution which resist any change in pH on adding a small amount of acid or base . it…

Q: You are titrating 25.00 ml of 0.100 M HOAc with 0.100 M KOH. What is the pH of the…

A: Here in this question, we firstly find the degree of neutralization f.f = (28.40*0.1)/(25*0.1) =…

Q: A student needs to prepare a buffer of pH 3.  The chemicals available in the lab are the following:…

A: Buffer is a solution that resists change in pH. It contains a weak acid and its conjugate base.  A…

Q: chemist needs a buffer solution of pH 3.90.  a. Are formic acid (pKa = 3.74) and its salt sodium…

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Q: Which acid should be used to make a buffer at a pH of 3.65? Select one: a. An acid with a K, =…

A: we have to tell which acid should be used to make buffer of pH 3.65

Q: In order to prepare a buffer of 4.24, what ratio of  [acetate ion] / [acetic acid]?   pKa of CH3COOH…

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Q: Design a buffer that has a pH of 11.21 using one of the weak acid/conjugate base systems shown…

A: A buffer is a solution which resists any change in pH on adding a small amount of acid or base.  It…

Q: Taking the pka for acetic acid as 4.75, calculate the concentration of acetate if 4 g of acetic acid…

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Q: Consider the following reaction: Ksp of CaCO3 = 4.9 × 10-9 Ka of HCO3¯= 4.7 × 10-11 CaCO3 (s) +…

A: K for the reaction is; CaCO3s↔Ca2+aq+CO32-aq, Ksp=Ca2+CO32- ...... iCO32-aq+H+aq↔HCO3-aq,…

Q: Find the pH of the buffer containing 0.0005 M acetic acid and 0.00045 M sodium acetate without…

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Q: the reagent potassium phosphate tribasic trihydrate (K3PO4*3H2O) and 1.1M HCl and 1.1 M NaOH. you…

A: Given: The reagent potassium phosphate tribasic trihydrate (K3PO4*3H2O) and 1.1M HCl and 1.1 M NaOH.…

Q: If you wanted to create a buffer solution based on H2S/HS- with a pH 7.7, what mass of Nas would you…

A: Given: Volume of solution = 300 mL = 0.3 dm3                                (Since 1 dm3 = 1000 mL)…

Q: A biochemistry student wants to make an acidic buffer with pH of 4.20. hey will start with 250 mL of…

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Q: When conducting a titration of an acid by adding base to the equivalence point, it is appropriate to…

A: Titration: Titration is an experiment adopted to estimate the concentration of an unknown analyte…

Q: A. The volume ratio of 0.1M HPO4 2 to 0.1M H2PO4 in i) pH 6.2 il) pH 7.2 iii) pH 8.2

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: You make a 200mM potassium phosphate buffer (pKa of 7.20) with monobasic potassium phosphate…

A: Given: Concentration of solutes = 200 mM = 0.200 M                                (Since 1 M = 1000…

Q: Which of these indicators could be used in the titration of aspirin (pKa = 3.5) and which could be…

A: We have to find out suitable indicator. Given aspirin pKa = 3.5 quinine pKa = 8.05

Q: A common buffer present in foods uses citric acid (pKa = 3.11) and its conjugate base. If the…

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Q: 51. Which of the following conjugate acid/conjugate base pair serves as a buffering system in higher…

A: In the body of animals, chemical buffer system consists of three individual buffers: the carbonic…

Q: 17. What is the pH of the solution produced when 50 mL of 0.25 M HCl is added to 250.0 mL of 0.1 M…

A: Information about the question

Q: Which of the following acids would you use to make a buffer with a pH of 3.00?     a.     Nitrous…

A: Which of the following acids would you use to make a buffer with a pH of 3.00?

Q: 35. The pH of a boric acid (Ka=5.8x10-10) buffer formed by the combination of 0.15 M boric acid that…

A: The pH of a boric acid buffer formed by the combination of boric acid and sodium borate is…

Q: A biochemistry student wants to make an acidic buffer with pH of 4.20. They will start with 250 mL…

A: #1.1: Given pKa of the acetic acid, HC2H3O2 = 4.75 Concentration of weak acid, HC2H3O2 = 0.5 M…

Q: Good's buffers are compounds that are useful near neutral pH. MES buffer has pKa of 6.15, MOPS has…

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.