Hydrocyanic Acid,HCN,is a Weak Acid Whose K_a Value Is 4

question 30

Multiple Choice

Hydrocyanic acid,HCN,is a weak acid whose K_a value is 4.0 10^-10.What is the [H⁺¹] in a 0.10 M solution of HCN?

• A)1 10^-4
• B)6.3 10^-6
• C)4.0 10^-9
• D)1.0 10^-11

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Definitions:

General Adaptation Syndrome

A model describing the body's short-term and long-term reactions to stress, consisting of three stages: alarm, resistance, and exhaustion.

Adrenal Glands

A pair of endocrine glands that release hormones that prepare the body for emergencies and stressful situations and also release corticoids and small amounts of the sex hormones.

Pituitary Gland

The endocrine gland located in the brain that releases hormones that activate other endocrine glands as well as growth hormone; often called the “master gland.”

General Adaptation Syndrome (GAS)

A theoretical model describing the body's short-term and long-term reactions to stress.