A Titration of 200 $\times$ 10^-5,K_a2 = 3 $\times$ 10^-9

question 50

Multiple Choice

A titration of 200.0 mL of 1.00 M H₂A was done with 1.02 M NaOH.For the diprotic acid H₂A,K_a1 = 2.5 $\times$ 10^-5,K_a2 = 3.1 $\times$ 10^-9.Calculate the pH after 600.0 mL of 1.02 M NaOH have been added.

• A)13.423
• B)0.577
• C)13.712
• D)0.288
• E)9.423

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Definitions:

Straight-line Method

A method of calculating depreciation of an asset, which spreads the cost evenly over its useful life.

Depreciation Expense

An accounting method that allocates the cost of a tangible asset over its useful life.

Residual Value

The estimated value that an asset will realize upon its sale at the end of its useful life, important in calculating depreciation.