Acids & Bases

A substance is found to have the following characteristics:

• very bitter taste

• feels slippery to the touch

• releases (OH)- ions when in solution

• In what category would the substance be classified?

• neutral

• acid

• base

Which of the following pH values represents a base?

• pH 2

• pH 7

• pH 9

If the substance is neutral, what would the pH be?

• pH 8

• pH 7

• pH 6

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

• a stronger acid

• a neutral solution

• a stronger base

Milk is a very weak acid. What might its pH value be?

• pH 6.5

• pH 4.5

• pH 7.5

The pH value of a substance indicates the ____________ of hydrogen ions (H+) and hydroxide ions (OH-) in a solution.

• amount

• charge

• concentration

Tags

NGSS.HS-PS1-5

When the pH of a pool is too high, algae and bacteria can flourish. What do you need to add to lower it?

• a base

• an acid

• a neutral substance

A _________ pH number means a stronger acid.

• higher

• lower

• decimal

Acids are always dangerous.

• True

• False

In a neutralization reaction, what are the products of a reaction between an acid and a base?

• another base

• another acid

• water and a salt