Acids and Bases Video

Which of the following properties is characteristic of bases?

• Sour taste

• Reacts with metals to form hydrogen gas

• Slippery and soapy feel

• Changes blue litmus paper to red

How do acids affect litmus paper?

• Changes red litmus to blue

• Changes blue litmus to red

• Causes no change in litmus color

• Turns litmus paper yellow

What does a pH value of 7 indicate for a solution?

• It is strongly acidic.

• It is strongly basic.

• It is a neutral solution.

• It is an electrolyte.

Why are antacids prescribed to treat hyperacidity?

• To increase the production of gastric juice.

• To make the stomach lining more acidic.

• To neutralize the excess hydrochloric acid in the stomach.

• To aid in the digestion of food directly.