8.3

Question 1

What does an acid taste like?

Answer 1

Sour

Question 2

What does a base taste like?

Answer 2

Bitter

Question 3

What does a base feel like to touch?

Answer 3

Slippery or soapy

Question 4

Do bases or acids react with metals?

Answer 4

Acids

Question 5

What does Litmus paper do?

Answer 5

It’s an indicator to quickly test whether a substance is an acid or base.

Question 6

If Litmus paper turns Red, was the solution acidic or basic?

Answer 6

An Acidic solution

Question 7

If Litmus paper turns Blue, was the solution acidic or basic?

Answer 7

A Basic solution

Question 8

What is an alkali?

Answer 8

A base that dissolves in water

Question 9

What are solutions formed by alkalis called?

Answer 9

Alkaline solutions

Question 10

What will the pH value of a Acidic solution be?

Answer 10

The pH value will be less than 7

Question 11

What will the pH value of an Alkali solution be?

Answer 11

The pH value will be more than 7

Question 12

What will the pH value of an Neutral solution be?

Answer 12

The pH value will be 7

Question 13

What is an indicator?

Answer 13

A substance that changes colour in the presence of an acid or a base

Question 14

What colour is a strong acid with a ph < 3?

Answer 14

Red

Question 15

What colour is a weak acid with a ph 3 - 6?

Answer 15

Orange/Yellow

Question 16

What colour is a Neutral solution with a ph 7?

Answer 16

Green

Question 17

What colour is a weak alkali with a ph 8 - 11?

Answer 17

Blue

Question 18

What colour is a strong alkali with a ph > 11?

Answer 18

Indigo or Violet