Which of the following could be added to a solution of sodium acetate to produce

Question

Which of the following could be added to a solution of sodium acetate to produce a buffer? why acetic acid hydrochloric acid potassium acetate sodium chloride A) acetic acid only B) acetic acid or hydrochloric acid C) hydrochloric acid only D) potassium acetate only E) sodium chloride or potassium acetate Answer: B

17) In which of the following aqueous solutions would you expect AgCl to have the lowest solubility?

A) pure water

B) 0.020 M BaCl2

C) 0.015 NaCl

D) 0.020 AgNO3

E) 0.020 KCl

Answer: B

Explanation / Answer

1 ) B) acetic acid or hydrochloric acid

buffer is the mixture of weak acid and its salt of strong base

acetate buffer means : CH3COOH + CH3COONa

already we have sodium acetate . on addition of acetic acid it will give a buffer . and on addition of HCl that react react with sodium acetate produce acetic acid so it can also be buffer

CH3COONa + HCl -------------------> CH3COOH + NaCl

mixture contains CH3COOH + CH3COONa so it is buffer

17)

AgCl solubility decreases in presence of common ion but with extra concentration of common ion will reduce more solubility .

AgCl ----------------------> Ag+   + Cl-

AgCl solubility decreases by

B) 0.020 M BaCl2

C) 0.015 NaCl

E) 0.020 KCl

NaCl and KCl reduce the solubility . but BaCl2 reduce more solubility of AgCl .

it is due to concentration of Cl- = 2 x 0.02 = 0.04 M .

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.