CA 2.4 Acids & Bases Review

Acids react with

• water to produce bases and salts

• salts to produce bases and water

• neither bases, salts, or water

• bases to produce salts and water

A substance is found to have the following characteristics:

Very bitter taste, feels slippery to the touch, produces OH- ions when dissolved in water.

In what category would this substance be classified?

• Acid

• Base

• Enzyme

• Fatty acid

HF could be classified as...

• An acid, because it contains Hydrogen and will form H+ ions when dissolved in water.

• A base, because it contains Hydroxide and will form OH- ions when dissolved in water.

• A salt

• An ionic compound

HNO₂ would be classified as...

• A base

• An acid

• A salt

• An ionic compound

Tags

NGSS.MS-PS1-1

This type of solution releases Hydrogen ions into an aqueous (water-based) solution

• A base

• An acid

• A salt

• An ionic compound

KOH can be classified as...

• An acid, because it contains Hydrogen and will form H+ ions when dissolved in water.

• A base, because it contains Hydroxide molecules and will form OH- ions when dissolved in water.

• A salt

• An ionic compound

The pH of a solution is 2. This solution would be considered...

• A strong base

• A weak base

• A strong acid

• A weak acid

Tags

NGSS.MS-PS1-2

Which of the following statements is TRUE?

• Blue litmus paper turns red when dipped in a base.

• Blue litmus paper stays blue when dipped in an acid.

• Red litmus paper turns blue when dipped in a base.

• Red litmus paper stays red when dipped in an acid.

Which of these pH values BEST represents an acid?

• 10

• 8

• 12

• 4

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

• 4.2

• 12.2

• 6.5

• 7.8