For 500.0 mL of a buffer solution that is 0.185 molL−1 in
C2H5NH2 and 0.175 molL−1...
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Chemistry
For 500.0 mL of a buffer solution that is 0.185 molL−1 inC2H5NH2 and 0.175 molL−1 in C2H5NH3Cl, calculate the initial pH andthe final pH after adding 0.020 mol of HCl.
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Method One a HONH2 H2O HONH3 OH Before add HCl 0400 0 trace After add HCl 0380 0020 trace Kb HONH3OHHONH2 00200380OH 11E8 OH 0209E6 pOH 668 pHpOH 14 pH 732 b HONH3Cl is the acid in this conjugated acidbase couple Hence the added HCl will not react with HONH3Cl and H3O 0020 H3O 0020 Therefore pH
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