Question 8.CC.7: Identifying Buffer Solutions Indicate whether each of the fo......

Chemistry: An Introduction to General, Organic, and Biological Chemistry [1013382]

Identifying Buffer Solutions
Indicate whether each of the following would make a buffer solution:
a. HCl, a strong acid, and NaCl b. $\mathrm{H}_{3}\mathrm{PO}_{4}$ , a weak acid
c. HF, a weak acid, and NaF

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a. No. A strong acid will change the pH of a solution. A buffer requires a weak acid and its salt.
b. No. A weak acid is part of a buffer, but the salt of the weak acid is also needed.
c. Yes. This mixture would be a buffer since it contains a weak acid and its salt.

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