Chemistry Unit Review

Acids are what range on the pH scale?

• 0 - 14
• 0 - 6
• 7
• 8 - 14

Vinegar is an example of  __________

• A base
• An acid
• A neutral substance

Bases are what range on the pH scale?

• 0 - 6
• 7
• 8 - 14
• 0 - 14

What color does acid turn litmus paper?

• It turns litmus paper purple.
• It turns red litmus paper blue.
• It turns blue litmus paper blue.
• It turns blue litmus paper red.

What color does bases turn litmus paper?

• It turns litmus paper purple.
• It turns blue litmus paper red.
• It turns red litmus paper blue.
• It turns red litmus paper re

Drain cleaner has a pH of 13. What is drain cleaner?

• An acid.
• A strong base.
• Neutral.
• A weak base.

A pH scale is...

• A  corrosive substance that says a substance is an acid.
• An indicator that tells if a substance is an acid or base. 
• A blue litmus paper.
• A red litmus paper.

What might happen if you mixed a strong acid with an equally strong base?

• You would see an explosive chemical reaction.
• The acid would destroy the base.
• The base would destroy the acid.
• You would wind up with a pH-neutral substance.

Which of the following substances is basic?

• soda
• lemon juice
• soap
• vinegar

On the pH scale, acids are ___ ___ 7, while bases are ___ ___ 7.

• greater than / less than
• less than / greater than