Biochemistry: Concepts and Connections
1st Edition
ISBN: 9780321839923
Author: Dean R. Appling, Spencer J. Anthony-Cahill, Christopher K. Mathews
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 2, Problem 8P
What is the pH of the following buffer mixtures?
a. 100 mL 1 M acetic acid plus 100 mL 0.5 M sodium acetate
b. 250 mL 0.3 M phosphoric acid plus 250 mL 0.8 M KH2PO4
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
What is the pH of the following buffer mixtures? (a) 100 mL 1 M acetic acid plus 100 mL 0.5 M sodium acetate (b) 250 mL 0.3 M phosphoric acid plus 250 mL 0.8 M KH2PO4
A buffer contains 0.015 mol of lactic acid (pK₁ = 3.86) and 0.080 mol of sodium lactate per liter.
H₂C
OH
Lactic acid
OH
Calculate the pH of the buffer.
H₂C.
Calculate the change in pH after adding 9.0 mL of
0.10 M HCl to 1.0 L of the buffer.
O
OH
Sodium lactate
Calculate the change in pH after adding 9.0 mL of
0.10 M HCl to 1.0 L of pure water.
O Na+
buffer pH:
buffer pH change:
water pH change:
units
units
What happened to the pH when the cola and borax solution was added to the water? Explain
Chapter 2 Solutions
Biochemistry: Concepts and Connections
Ch. 2 - Suppose a chloride ion and a sodium ion are...Ch. 2 - Draw two different possible hydrogen-bonding...Ch. 2 - Prob. 3PCh. 2 - 4. What is the pH of each of the following...Ch. 2 - Prob. 5PCh. 2 - The weak acid HA is 2% ionized (dissociated) in a...Ch. 2 - 7. Calculate the pH values and draw the titration...Ch. 2 - What is the pH of the following buffer mixtures?...Ch. 2 - a. Suppose you wanted to make a buffer of exactly...Ch. 2 - Prob. 10P
Ch. 2 - You need to make a buffer whose pH is 7.0, and you...Ch. 2 - Describe the preparation of 2.00 L of 100 glycine...Ch. 2 - Carbon dioxide is dissolved in blood (pH 7.4) to...Ch. 2 - What is the molecular basis for the observation...Ch. 2 - The anno acid arginine ionizes according to the...Ch. 2 - It is possible to make a buffer that functions...Ch. 2 - A student is carrying out a biological preparation...Ch. 2 - Histidine is an amino acid with three titratable...Ch. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - Prob. 21P
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biochemistry and related others by exploring similar questions and additional content below.Similar questions
- Consider the following pH titration curve of a diprotic acid. What is the approximate values for pka 1 and pka 2? the curve is attached below.arrow_forwardWhat are the buffering ranges for this titration curve? Please tell the ranges and indicate on the graph where they are. Thanks!arrow_forwardA 35 mL of solution of hydrochloric acid is neutralized by 15 mL of 0.5 M potassium hydroxide. What is the concentration of hydrochloric acid? The balanced equation is HCI + KOH - H,O + KCI O 0.75 M O 0.25 M O 0.214 M O 0.786 Marrow_forward
- Shown below is the titration curve for phosphoric acid. At what pH is the solution entirely in the H3PO4 form? 0-0.5 14 12.5 O2.1 NICHarrow_forwardRefer to the following titration curve below: 13 12 11 10 7 5 4 3 2 8 10 12 14 16 18 20 22 24 26 28 30 Volume of Titrant / mL Unknown Acid 0.10 mol/L - titrant = NaOH 0.1 mol/L How many buffering regions are present in the titration curve of the amino acid?arrow_forwardA 110.0value - mL buffer solution is 0.255M in NH3 and 0.395 M in NH4Br. The Kb alue for NH3 is 1.76 x 10^-5. What mass of HCI could be handled before the pH falls below 9.00 ?arrow_forward
- Using the Henderson-Hasselbalch equation, calculate the pH of a buffer solution made from 0.20 M CH3COOH and 0.050 M CH3COO- that has pk3= 4.7. 4.1 0.4 None of the answers is correct 2.5 5.3arrow_forwardYou receive an order for 24 mEq calcium gluconate in 50 mL normal saline. What volume, in mL, of calcium gluconate 10% stock solution is needed to provide the number of mEq ordered? Cation Aluminum Ammonium Calcium Ferric Ferrous Lithium Magnesium Potassium Sodium Formula Valence Formula weight A13+ 3 1 2 3 2 1 2 1 1 NH₂+ Ca²+ Fe³+ Fe2+ Li+ Mg2+ K+ Na+ 27 18 40 56 56 7 24 39 23 Anion Acetate Bicarbonate Carbonate Chloride Citrate Gluconate Hydroxide Lactate Phosphate, monobasic Phosphate dibasic Sulfate Formula Valence C₂H30₂ 1 HCO3 1 CO3²- 2 CI- 1 3 1 1 1 1 C6H5O7³- C6H₁107 OH- C6H5O3 H₂PO4 HPO4²- SO₂²- 2 2 Formula weight 59 61 60 35.5 189 195 17 89 97 96 96arrow_forwardfill in the volumes required to make the various dilutions of Coomassie Blue and their respective concentrations. show sample calculations.arrow_forward
- Calculate the pH of the resulting solution if 23.0 mL of 0.230 M HCl(aq) is added to 33.0 mL of 0.230 M NaOH(aq). pH = Calculate the pH of the resulting solution if 23.0 mL of 0.230 M HCl(aq) is added to 13.0 mL of 0.330 M NaOH(aq). pH=arrow_forwardAn aqueous solution contains 0.34 M potassium cyanide. One liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) 0.34 mol HCI04 0.16 mol NaOH 0.33 mol KCIO4 0.16 mol HCIO4 0.33 mol HCNarrow_forwardYou need to prepare an acetate buffer of pH 5.43 from a 0.621 M acetic acid solution and a 2.95 M KOH solution. If you have 730 mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 5.43? The pKa of acetic acid is 4.76. Be sure to use appropriate significant figures.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Basic Clinical Lab Competencies for Respiratory C...NursingISBN:9781285244662Author:WhitePublisher:Cengage
Basic Clinical Lab Competencies for Respiratory C...
Nursing
ISBN:9781285244662
Author:White
Publisher:Cengage
Haematology - Red Blood Cell Life Cycle; Author: Armando Hasudungan;https://www.youtube.com/watch?v=cATQFej6oAc;License: Standard youtube license