How Much Solid NaCN Must Be Added to 1

question 39

Multiple Choice

How much solid NaCN must be added to 1.0 L of a 0.5 M HCN solution to produce a solution with pH 7.0? K_a = 6.2 × 10^-10 for HCN.

• A) 0.0034 g
• B) 0.15 g
• C) 160 g
• D) 24 g
• E) 11 g

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Definitions:

DC

DC stands for direct current, which is an electrical current that flows in one direction only, used in batteries, electronics, and some power supplies.

Capacitance Unit

The unit of measurement for capacitance, the farad (F), indicating the ability of a system to store an electric charge.

Farad

The unit of capacitance in the International System of Units (SI), symbolized as F, indicating the capacity of a capacitor to store charge per unit voltage.

Leakage Current

The amount of current that flows through the dielectric separating the plates of a capacitor.