A Solution Is Prepared by Dissolving 20

question 48

Multiple Choice

A solution is prepared by dissolving 20.0 g of K₂HPO₄ and 25.0 g of KH₂PO₄ in enough water to produce 1.0 L of solution. What is the pH of this buffer? For phosphoric acid (H₃PO₄) , K_a2 = 6.2 × 10^-8.

• A) 7.70
• B) 7.42
• C) 7.21
• D) 7.00
• E) 6.72

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Definitions:

Closing Entry

Journal entries made at the end of an accounting period to transfer the balances of temporary accounts to permanent accounts, thereby resetting the temporary accounts for the next period.

Revenue and Expense Account Balances

Represents the amounts recorded in the financial statements for income earned and costs incurred by a company during a reporting period.

Adjusting Entry

A journal entry made at the end of an accounting period to allocate revenue and expenses to the correct periods.

Earnings Per Share

A financial metric calculated by dividing the net earnings available to common shareholders by the average outstanding shares.