lab 7 in lab

lab 7 in lab - 3B 5 9 4.39 9.0 yes no 4B 6 15 4.95 15 yes...

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Solu tion # mL of 0.60 M HC 2 H 3 O 2 mL of 0.60 M NaC 2 H 3 O 2 pH 1A 30 0 2.41 2A 30 10 3.65 3A 0 30 7.28 4A 10 30 4.91 5A 20 20 4.49
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the pH increases as the mL of base added minus the mL of acid added increases the pH increases as the mmol of base added minus the mmol of acid added increases the pH decreases as the mL of acid added minus the mL of base added increases the pH increases as the mmol of base added increases the pH decreases as the mmol of acid added increases the pH increases as the mL of base added increases the pH decreases as the mmol of acid added minus the mmol of base added increases the pH decreases as the mL of acid added increases Solution # mL of NaOH added total mL NaOH added pH total mmol NaOH added Buffer? 1B 0 0 3.09 0 yes no 2B 4 4 3.86 4.0 yes no
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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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This note was uploaded on 03/18/2011 for the course CHEM 202 taught by Professor Feducia during the Spring '09 term at N.C. State.

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lab 7 in lab - 3B 5 9 4.39 9.0 yes no 4B 6 15 4.95 15 yes...

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