A 2000-ML Sample of the Weak Acid H₃A (0

question 15

Multiple Choice

A 200.0-mL sample of the weak acid H₃A (0.100 M) is titrated with 0.200 M NaOH. What are the major species at each of the following points in the titration? (Water is always assumed to be a major species.)
-After 75.0 mL of 0.200 M NaOH is added

• A) H₂A^-
• B) HA^2-
• C) H₃A, H₂A^-
• D) H₂A^-, HA^2-
• E) H₃A

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Definitions:

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The difference between the planned and actual units sold multiplied by the planned sales price.

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The difference between the actual total revenue earned and the expected total revenue in a period.

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

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The difference between the actual cost of direct labor and the expected (or standard) cost multiplied by the actual hours worked.