A Sample of Magnesium Oxide Was Dissolved in 50

question 46

Multiple Choice

A sample of magnesium oxide was dissolved in 50.0 mL of 0.183 M hydrochloric acid,and the excess acid was titrated to a phenolphthalein end-point by 13.4 mL of 0.105 M sodium hydroxide.What was the mass of the magnesium oxide sample?

• A)312 mg
• B)184 mg
• C)156 mg
• D)104 mg
• E)77.8 mg

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Definitions:

Trial Balance

A trial balance is a bookkeeping worksheet in which the balances of all ledgers are compiled into debit and credit account column totals that are equal.

Debits

Accounting entries that can increase asset or expense accounts or decrease revenue, liability, or equity accounts.

Credits

In accounting, credits refer to a bookkeeping entry that increases a credit account or decreases a debit account on a company's balance sheet.

Stockholders' Equity

The residual interest in the assets of a corporation after deducting liabilities, representing the ownership of the company’s shareholders.