A 015 M Aqueous Solution of the Weak Acid HA at at 25.0°C

question 49

Multiple Choice

A 0.15 M aqueous solution of the weak acid HA at 25.0°C has a pH of 5.35. The value of K_a for HA is __________.

• A)3.0 × 10^-5
• B)1.8 × 10^-5
• C)7.1 × 10^-9
• D)1.3 × 10^-10
• E)3.3 × 10⁴

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Definitions:

Subcutaneous

Pertaining to under the skin, often referring to a route of medication administration.

Injection

The act of administering a liquid, such as a drug or vaccine, directly into a body tissue, often through a syringe and needle.

Angle

The figure formed by two rays, called the sides of the angle, sharing a common endpoint termed the vertex.

Retention Enema

A medical procedure involving the introduction of fluid into the rectum, which is meant to be held in for a designated period to achieve a therapeutic effect.