C4 - The group 1 elements

Question 1

Why are group 1 elements called alkali metals?

Answer 1

This is because their reaction with water gives alkaline solutions.

Question 2

When an alkali metal reacts with water what does it produce?

Answer 2

Metal hydroxide (alkali solution) and hydrogen.

Question 3

What colour does a compound of sodium produce in a flame?

Answer 3

Yellow.

Question 4

What colour does a compound of potassium produce in a flame?

Answer 4

Lilac.

Question 5

What colour does a compound of lithium produce in a flame?

Answer 5

Red.

Question 6

Describe the test to find out which chemical is in the compound?

Answer 6

1) flame test wire is moistened with dilute Hal
2) flame test wire is dipped into solid chemical
3) flame test wire is held over the bunsen burner
4) record the colour of the flame

Question 7

What is oxidation?

Answer 7

The loss of an electron.

Question 8

What is the ionic equation for oxidation of potassium?

Answer 8

K - e- = K+