A Solution Is Prepared by Dissolving 0

question 96

Multiple Choice

A solution is prepared by dissolving 0.23 mol of hydrofluoric acid and 0.27 mol of sodium fluoride in water sufficient to yield 1.00 L of solution. The addition of 0.05 mol of HCl to this buffer solution causes the pH to drop slightly. The pH does not decrease drastically because the HCl reacts with the __________ present in the buffer solution. The K_a of hydrofluoric acid is 1.36 × 10^-3.

• A)H₂O
• B)H₃O⁺
• C)fluoride ion
• D)hydrofluoric acid
• E)This is a buffer solution: the pH does not change upon addition of acid or base.

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Definitions:

Perpetual Inventory System

An approach to inventory management where inventory levels are updated in real-time following each sale or purchase.

Sales Return

Goods returned by the customer to the seller after the sale, leading to a reversal of revenue recorded.

Collection

Collection involves the process of gathering or receiving payments, funds, or necessary documents, especially in the context of business receivables or debts.

Perpetual Inventory System

Inventory accounting method where transactions are instantly recorded via computerized point-of-sale systems and enterprise asset management software.