Home Learning Test

Question 1

If you put red litmus paper into an acid it turns?

Answer 1

Stays red.

Question 2

If you put red litmus paper into an alkali it turns

Answer 2

Blue.

Question 3

If you put blue litmus paper into an acid it turns?

Answer 3

Red

Question 4

If you put blue litmus paper into an alkali it turns?

Answer 4

Blue

Question 5

Describe the method for producing copper sulfate from a base and an acid.

Answer 5

A suitable answer is . so we need to use sulfuric acid. Copper oxide and copper carbonate. Make Copper Sulfate. Fill a jar or beaker with 5 ml concentrated sulfuric acid and 30 ml of water. If your sulfuric acid solution is already diluted, add less water. Set two copper wires into the solution so that they are not touching each other.

Question 6

What is a pH scale?

Answer 6

Mixing acids and bases can cancel out or neutralize their extreme effects. A substance that is neither acidic nor basic is neutral. The pH scale measures how acidic or basic a substance is. The pH scale ranges from 0 to 14.

Question 7

How do you name a salt?

Answer 7

The first part comes from the metal, metal oxide or metal carbonate. The second part comes from the acid. You can always work out the name of the salt by looking at the reactants: nitric acid always produces salts that end in nitrate and contain the nitrate ion