1. Which of the following 1-L aqueous solutions is a buffer, and why are the other...

Question

Question

1. Which of the following 1-L aqueous solutions is a buffer, and why are the other options incorrect?

A. 0.08 Mol HNO₃ + 0.10 Mol NaNO₃

B. 0.08 Mol HNO₃ + 0.10 Mol HCN

C. 0.08 Mol HNO₃ + 0.10 Mol NaCN

D. 0.08 Mol HCN+ 0.00010 Mol NaCN

2. Which of the following mixtures would a SFRC table be need to keep track of amounts, and why are the other options incorrect?

A. strong acid and weak acid

B. strong acid and weak base

c. weak acid and weak base conjugate pair

d. weak base and water

science chemistry

Answer 1

Answer #1

1. Answer: D. 0.08 Mol HCN+ 0.00010 Mol NaCN

Mixture of weak acid(HA), salt of weak acid(HA),strong base acts as buffer.This combination is present only in option D but not in others.

2. Answer: B. strong acid and weak base

mixture acts as buffer but others are not buffers.so that, its amounts must be known to study the buffer capacity.

Answer 2

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