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Use Reaction Equations to Describe Chemical Changes

1. A buffer was prepared from equal molar quantities of acetic acid, HC2H3O2 and sodium acetate, NaC2H3O2. Explain how the buffer keeps the pH of the solution at about the same value (a) after the addition of a few drops of a dilute HCl solution and (b) after the addition of a few drops of a dilute NaOH solution. Use reaction equations to describe the chemical changes that occur.

2. How would the answer be different if the buffer was prepared from equal molar quantities of sodium bicarbonate and sodium carbonate?

Solution Preview

1. A buffer causes a solution to be resistant to change in in pH on addition of a strong acid or base.

a) Any hydronium ion (HCl) added to the solution ...

Solution Summary

The solution provides reaction equations for acid/base reactions.

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