pH Test

A(n) is a substance with a pH less than 7
(a)  

• Acid
• Alkaline
• Base
• Buffer

A(n) (a)   is a substance with a pH greater than 7.

• Base
• Acid
• Buffer
• Water

Complete the sentence. A substance that is more basic has a ​ ​ (a)   pH than a substance that is acidic.

• higher
• lower
• the same
• none of the above

In a test of pH levels, a baking soda has a pH of 9 and bleach has a pH of 12. What is true about their relationship?

• Both of the solution are Bases

• Both of the solution are Acids

• The Baking soda is an acid and the Bleach is a base

• The baking soda is a base and the Bleach is an Acid.

A base is a substance

• That releases OH- ions when dissolved in water

• That releases H+ ions when dissolved in water

• Does not release any ions when dissolved in water

• None of the above

The picture below shows the relative concentrations of H+ and OH- in a solution. From the picture, we can tell this solution is ?

(a)  

• basic
• acidic
• Neutral

An acid

• is a substance that releases H+ ions when dissolved in water

• is a substance that does not release any ions when dissolved in water

• is a substance that releases OH- when dissolved in water

• releases an equal amount of OH- and H+ ions when dissolved in water

Water has a neutral pH because

• it has more H+ ions than OH-

• it has more OH- ions than H+

• it does not produce any ions

• it has an equal amount of H+ and OH- in solution

According to the pH range which substance is more acidic than lemon juice

• Hydrochloric acid

• cabbage

• milk

• Lye

A solution has a pH of 7.0.  What would happen to the pH if H ions were added?

• pH would go up
• pH would go down
• pH would stay the same
• None of these