Methyl Red Is a Common Acid-Base Indicator

question 65

Multiple Choice

Methyl red is a common acid-base indicator.It has a K_a equal to 6.3 × 10^-6.Its un-ionized form is red and its anionic form is yellow.What color would a methyl red solution have at pH = 7.8?

• A)green
• B)red
• C)blue
• D)yellow
• E)violet

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Definitions:

Anterior Pituitary

Portion of the pituitary gland that is controlled by the hypothalamus and produces six types of hormones, some of which control other endocrine glands.

Arterial Duct

A blood vessel in a fetus that connects the pulmonary artery to the descending aorta, allowing most of the blood to bypass the fetus's developing lungs.

Pulmonary Trunk

The major artery that exits the heart, carrying deoxygenated blood from the right ventricle to the lungs for oxygenation.

Aorta

In humans, the major systemic artery that takes blood from the heart to the tissues.