Acids and Bases

An indicator will ______________ when it is in contact with an acid or base

• bubble

• form a new substance

• change color

• stay the same color

Bases will turn litmus paper __________, while acids will turn litmus paper __________.

• blue.....red
• red.....blue
• pink.........colourless
• colourless..........pink

What does a pH scale do?

• Tells you if a substance is an acid.

• Tells you if a substance is a base.

• Measures the strength or weakness of an acid or base.

• All of these are true.

The H in pH stands for _________.

• helium

• hand

• hydrogen

• help

An acid has a pH ___________.

• higher than 7

• lower than 7

• 7

• greater than 14

A pH of 14 is a .....

• strong acid

• weak acid

• strong base

• weak base

Which type of ion does a base produce when it is dissolved in water?

• oxide
• oxygen
• hydrogen
• hydroxide

When dissolved in water, acids produce:

• bases
• salts
• hydrogen ions
• hydroxide ions

If an acid is combined with a base of equal strength, the result will most likely be

• a neutral solution.
• a stronger acid.
• impossible to tell without testing the pH.
• a stronger base

Which of the following is a base?

• orange juice
• water
• vinegar
• dishwashing detergent