How Much Solid NaCN Must Be Added to 1

question 94

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:

Visual Recognition Memory

The ability to remember and recognize previously encountered visual stimuli.

Intonation

The use of pitches of varying levels to help communicate meaning.

Visual Recognition Memory

The ability to recognize previously encountered objects, images, or individuals by visual features.

Cooing

The early vocalization of infants that involves soft, murmur-like sounds, often produced when they are content or exploring their vocal capabilities.