Acids And Bases 1 chapter 24

Question 1

What are alkalis?

Answer 1

They re bases that dissolve in water.

Question 2

Name 3 indicators.

Answer 2

Litmus, methyl orange, phenolphthalein.

Question 3

What give the exact pH of substances?

Answer 3

pH sensors with data loggers or computers.

Question 4

What is neutralisation?

Answer 4

When an acid is counteracted or neutralised by a base.

Acid+base=salt+water

Question 5

When is a salt formed?

Answer 5

It is formed when the hydrogen in an acid is replaced by a metal.

Question 6

What is a base?

Answer 6

It is the chemical opposite to an acid.

Question 7

What does an indicator do?

Answer 7

It shows by means of colour change the acidity or basicity of a substance.

Question 8

What does a pH scale show?

Answer 8

It shows the different levels of acidity and basicity. (0-14.)

Question 9

Give 3 examples of acidic substances.

Answer 9

Battery acid, lemon juice, vinegar.

Question 10

Give 3 examples of basic substances.

Answer 10

Washing soda, toothpaste, oven spray.

Question 11

Give 3 examples of a neutral substance.

Answer 11

Blood, distilled water, milk.

Question 12

Name the 5 types of acid.

Answer 12

Citric, hydrochloric, sulfuric, carbonic, acetic.