Buffer Quiz

A) Option C is the answer

Reason: A buffer is able to neutralize small amounts of added acid or base thus maintaining the pH of solution relatively stable.

B) Option B is the answer

Reason: A mixture of a WEAK acid and its CONJUGATE base (or a mixture of a weak base and its conjugate acid) is called a buffer solution, or a buffer. Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added

C) Option B is the answer

Reason: Acetic acid (CH3COOH) and sodium acetate (CH3COONa) or weak base and its salt, such  as, AMMONIA (NH3) and ammonium chloride (NH4Cl).

D) Option A: Ethanoic acid and sodium Ethanoic acid and sodium Hydroxide.

Reason: Let if the solution contained equal molar concentrations of both the acid and the salt, it would have a pH of 4.76. It wouldn't matter what the concentrations were, as long as they were the same.

E) Option C is the answer

Reason: Consider a buffer solution containing 0.1 mole each of acetic acid and sodium acetate in a 0.1 L of solution. 0.01 mole of NaOH is gradually added to this buffer solution.

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