Consider a solution containing 0.100 M fluoride ions and 0.126 M hydrogen fluoride. The concentration of hydrogen fluoride after addition of 8.00 mL of 0.0100 M HCl to 25.0 mL of this solution is __________ M.
A)0.0979
B)0.0930
C)0.129
D)0.123
E)0.00976

Question

Quizplus · Accepted Answer

The addition of HCl will convert some fluoride ions to hydrogen fluoride. Calculate moles of HCl added, then use the buffer equation to find the new concentration of HF.

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