How Many Moles of HCl Need to Be Added to 150.0

question 46

Multiple Choice

How many moles of HCl need to be added to 150.0 mL of 0.50 M NaZ to have a solution with a pH of 6.50? (K_a of HZ is 2.3 $\times$ 10^-5) ? Assume negligible volume of the HCl.

• A)6.8 \(\times\) 10^-3
• B)7.5 \(\times\)10^-2
• C)5.0 \(\times\) 10^-1
• D)1.0 \(\times\)10^-3
• E)none of these

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