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Unformatted text preview: 3B 5 9 4.39 9.0 yes no 4B 6 15 4.95 15 yes no 5B 10 25 12.25 25 yes no they contain equal amounts of acetate ions and acetic acid they contain more acetic acid than acetate ions they contain both acetate ions and acetic acid they contain more acetate ions than acetic acid they contain only acetic acid they contain only acetate ions pH Assigned 7.50 actual mass of Na 2 HPO 4 7H 2 O used 3.005 g other phosphate compound used NaH 2 PO 4 H 2 O Na 3 PO 4 12H 2 O calculated mass of other phosphate compound to use 0.794 g actual mass of other phosphate compound used 0.798 g initial measured pH of buffer 6.95 action taken added acid added base final measured pH of buffer 7.53...
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- Spring '09
- pH, pH increases