Problem: Explain why the salt of a weak acid, as well as the acid itself, must be present to form a buffer solution. 1. The anion from the salt is needed to partially neutralize added base. 2. The anion from the salt is needed to partially neutralize added acid. 3. The cation from the salt is needed to partially neutralize added acid. 4. The cation from the salt is needed to partially neutralize added base. 5. Actually, a weak acid by itself is a buffer; no salt is needed. 

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Problem Details

Explain why the salt of a weak acid, as well as the acid itself, must be present to form a buffer solution.

1. The anion from the salt is needed to partially neutralize added base.

2. The anion from the salt is needed to partially neutralize added acid.

3. The cation from the salt is needed to partially neutralize added acid.

4. The cation from the salt is needed to partially neutralize added base.

5. Actually, a weak acid by itself is a buffer; no salt is needed. 

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Based on our data, we think this problem is relevant for Professor Fakhreddine's class at TEXAS.