nts) Consider the following buffer system, made up of E HOCI+H₂OOCI + H₂O NaOCI H₂O Na + OCI A) Is this buffer composed of a weak acid and its conjugate base or a weak base and its conjugate acid? B) What is the purpose of the NaOCI? What does it provide? Be specific C) Which part of the buffer neutralizes base (OH) that is added? Be specific D) Which part of the buffer neutralizes acid (H') that is added? Be specific that fit the chemical formula CH Draw the corres

nts) Consider the following buffer system, made up of E HOCI+H₂OOCI + H₂O NaOCI H₂O Na + OCI A) Is this buffer composed of a weak acid and its conjugate base or a weak base and its conjugate acid? B) What is the purpose of the NaOCI? What does it provide? Be specific C) Which part of the buffer neutralizes base (OH) that is added? Be specific D) Which part of the buffer neutralizes acid (H') that is added? Be specific that fit the chemical formula CH Draw the corres

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Which of the following does not represent the correct formula for a compound of sodium? A) NaCI B) Na20 C) Nas D) Na3N Which of the following can be constituents of a buffer solution? A) CH3COOH + CH3COONa B) HCI + CH3COONH4 C) CH3COOH + NH3CI D) NaOH + HCI NFIDENT Which of the following statement best describes the equation below and product formed? HCI(aq)+ NaOH(aq)→ NaCl(aq) +H,O (1) Sodium chloride (table salt) A) Salts contain a cation (a metal or ammonium ion) derived from the base and an anion excluding oxide or hydroxide ions) derived from the acid. B) Salts are ionic compounds C) Salts are generally crystalline compounds with high melting and boiling points. D) A, B and Care correct
For each of the buffer systems below, determine the concentration of the acid and base components in the buffer: 1) An acetate buffer with a pH of 5.15 and a concentration of 3.5M. The (HC2H302] = Type your answer here M and the [NAC2H302] = Type your answer here M 2) A Carbonate buffer with a pH of 9.85 and a concentration of 0.50M. The [NAHCO3] = Type your answer here M and the Na2CO3] = Type your answer here M 3) A Phosphate buffer of pH 2.5 and a concentration of 1.0M. The [H3PO4] = Type your answer here Mand the [KH2PO4) Type your answer here
A buffer is prepared from 60.0 mL of 0.100 M formic acid(HCOOH) and 40.0 mL of 0.100 M formate (HCOO --). What is thepH of the buffer solution ? K a of formic acid is 1.78 x 10 4
draw acid/bade titration curves for the following question Consider the titration of 100.0 mL of o.100 M acetic acid, CH, COOH, (a weak acid) with 0.100 M NaOH (a strong base). 1. pH of the acetic acid solution before the titration is begun. 2. When 50 mL of NaOH is added:
Write a balanced molecular equation between the reactions of Buffer and NaOH
Which of the following will give a buffer with a pH near 4.76 when the acid and conjugate base are mixed in equimolar proportions? Acid NH4* (from ammonia) HC₂H3O2 (acetic acid) HF (hydrofluoric acid) CH3CH₂NH3 (from ethylamine) acetic acid. b) ethylamine c) ammonia d) hydrofluoric acid e) none Ka 5.69 10-10 1.75 10-5 6.810-4 2.12 10-11
6. Which of the following mixtures would create an effective buffer? Give your reasoning in each case. a) 0.10 mol HCl and 0.10 mol NaOH in 1.0L H₂O. b) 0.10 mol NH3 and 0.15mol NH4Cl in 1.0L H₂O. c) 0.010mol HCN and 0.20mol NaCN 1.0L H₂O. d) 0.10 mol NH4Cl and 0.20mol NaCN in 1.0L H₂O. e) 0.10 mol HCl and 0.20mol NaCN 1.0L H₂O.
Which of the following solutions is a good buffer system? A) a solution thats is 0.10 M HNO2 and 0.10 M NaNO2 B) a solution that is 0.10 M NaOH and 0.10 M HNO3 C) a solution that is 0.10 M NaCl and 0.10 M HCI D) a solution that us 0.10 M HCN and 0.10 M HCI
Which of the following could produce a buffer when added in an appropriate amount to 0.1 M NaF? HI HF KF Ba(OH)2 C6H12O6
7,8
How many grams of dry NH4Cl need to be added to 2.50 L of a 0.300 M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.74? Kb for ammonia is 1.8×10−5 . (Please type answer no write by hend)
You need to prepare 100.0 mL of a pH 4.00 buffer solution using 0.100 M benzoic acid (p?a=4.20) and 0.180 M sodium benzoate. How many milliliters of each solution should be mixed to prepare this buffer? benzoic acid: mL sodium benzoate: mL