An Aqueous Solution Has [HC₇H₅O₂] = 0

question 46

Multiple Choice

An aqueous solution has [HC₇H₅O₂] = 0.100 M and [Ca(C₇H₅O₂) ₂] = 0.200 M.K_a = 6.3 × 10^-5 for HC₇H₅O₂.The solution volume is 5.00 L.What is the pH of this solution after 5.00 mL 10.0 M HCl(aq) is added?

• A)4.80
• B)4.86
• C)4.65
• D)4.70
• E)4.75

---

Definitions:

Labor Rate Variance

The difference between the actual cost of direct labor and the expected (or standard) cost, based on the standard hours worked and standard labor rate.

Variable Overhead Rate Variance

The difference between the actual variable overhead incurred and the expected variable overhead based on standard cost.

Materials Price Variance

The difference between the actual cost of raw materials and the standard or expected cost, multiplied by the quantity of materials purchased.

Variable Overhead Rate Variance

The difference between the actual variable overhead incurred and the expected (or budgeted) variable overhead based on a standard rate.