quiz chem

Concentrated sulfuric acid is a ___ and a powerful dehydrating agent.

• weak acid
• strong acid

During electrolysis, positive ions move towards the _______, where they gain electrons.

• cathode
• anode

At equilibrium, the concentrations of nitrogen, hydrogen, and ammonia remain constant, even though reactions continue to occur.

• True
• False

Fertilizers containing ammonia are used to provide plants with essential ___________________ to promote growth.

• nitrogen
• potassium
• phosphorus

The positive electrode in electrolysis is called the___________________.

• cathode
• anode

Phenolphthalein is colorless in acidic solutions and turns pink in basic solutions.

• True
• False

In acid-base titrations, the endpoint is reached when the indicator changes color.

• True
• False

In the Bronsted–Lowry theory, a base is a substance that ___________________ a proton.

• accepts
• donates

Sulfuric acid is a strong acid that can cause severe burns upon contact with skin.

• True
• False

Sulfur dioxide has no effect on the environment and does not contribute to air pollution.

• True
• False