Acids, Alkalis And Salts

Question 0

What are alkalis?

Answer 0

Bases which dissolve in water.

Question 1

What are bases?

Answer 1

Chemicals that neutralise acids.

Question 2

How can you measure acidity? Give an example

Answer 2

Using indicators which change colour when we had them to acids and alkalis.
Universal indicator is a very special indicator made from a number of dyes which turns different colours that different values of pH.

Question 3

What is 0 to 6 on the PH scale?

Answer 3

Acid.

Question 4

What is 7 on the PH scale?

Answer 4

Neutral (water)

Question 5

What is 8 to 15 on the pH scale?

Answer 5

Alkali.

Question 6

What does the reaction between an acid and a metal produce?

Answer 6

Salt and hydrogen.

Question 7

What does the reaction between an acid and a base produce?

Answer 7

Salt and water.

Question 8

What does the reaction between an acid and an alkali produce?

Answer 8

A salt and water.

Question 9

What is a precipitation reaction?

Answer 9

When two solutions react to make an insoluble salt.