Question

Which one of the following statements is TRUE? Which one of the following statements is TRUE? A buffer is an aqueous solution composed of two weak acids. A buffer resists pH change by neutralizing added acids and bases. A buffer can absorb an unlimited amount of base. A buffer does not change pH when strong acid is added. None of the above are true.

Answer 1

Answer:

The correct answer is "A buffer resists pH change by neutralizing added acids and bases".

Explanation:

In chemistry, a buffer is defined as an aquoeous solution that resist pH changes. Buffers are comprised of a weak acid (HA) and its conjugate base (A−) in an equilibrium relation, which results in the buffer neutralizing added acids and bases. Buffers play a crucial role in living beings since they provide a relative stable environment for the cells in what is known as homeostasis.

Answer 2

Answer:

A buffer resists pH change by neutralizing added acids and bases.

Explanation:

A buffer is an aqueous solution composed of two weak acids. False. A buffer is the mixture of a weak acid with its conjugate base or vice versa.

A buffer resists pH change by neutralizing added acids and bases. True. A buffer reacts with acid or base neutralizing, thus, pH change.

A buffer can absorb an unlimited amount of base. False. A buffer works just when ratio between substances in the mixture is 1:10.

A buffer does not change pH when strong acid is added. False. A buffer decreases change of pH by addition of acid or base but pH in a buffer change when acids are added.

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