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A compound has carboxyl group, an aminium group, and a guanidinium group. The pKas of the...

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Chemistry

A compound has carboxyl group, an aminium group, and aguanidinium group. The pKas of the groups are 3.6, 9.7,and 12.8, respectively. A biochemist has 100 mL of a 0.10 Msolution of this compound at a pH of 9.2. She adds 37 mL of 0.1 MHCl. To the nearest hundredth of a unit, what will be the pH of thesolution after addition of the HCl (assume full stirring to reach anew equilibrium)?

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4.1 Ratings (829 Votes)
Sol Let the given tribasic acid is H3A Now the equation for H2A acid at equilibrium will be H2A H HA2 According to HendersonHasselbalch equation we have 92 97 log H2AHA2 log H2AHA2 92 97 log    See Answer
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