Unformatted text preview: bu±er solution. 1. The cation from the salt is needed to partially neutralize added acid. 2. The anion from the salt is needed to partially neutralize added base. 3. Actually, a weak acid by itself is a bu±er; no salt is needed. 4. The cation from the salt is needed to partially neutralize added base. 5. The anion from the salt is needed to partially neutralize added acid. correct Explanation: The salt of the acid provides the anion which is the conjugate base of the bu±er sys-tem: HA + H 2 O ⇀ ↽ A-+ H 3 O + This anion A-reacts with any added acid (H 3 O + ) to prevent any appreciable change in pH. 005 2.0 points What is the pH of an aqueous solution that is 1.0 M HClO ( K a = 3 . × 10-8 ) and 0.75 M NaClO? 1. 6.36 2. 7.64 3. 7.40 correct 4. 7.52 5. 6.60 Explanation:...
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This note was uploaded on 05/19/2011 for the course CHEM 51615 taught by Professor Fatima during the Spring '11 term at University of Texas.
- Spring '11