Alkali Metal Compounds

Question 1

What can Alkali Metals react to form?

Answer 1

Compounds

Question 2

What are alkali metals when they are freshly cut?

Answer 2

Shiny

Question 3

What happens to them in the moist air?

Answer 3

They quickly tarnish, go dull and become covered in a layer of metal oxide.

Question 4

What do alkali metals vigorously react with?

Answer 4

Chlorine to form white crystalline salts

Question 5

What happens when Alkali metals react with water?

Answer 5

They form a metal hydroxide and hydrogen gas

Question 6

What happens when the metal hydroxide dissolves in water?

Answer 6

It forms a alkaline solution

Question 7

What does (s) mean?

Answer 7

Solid

Question 8

What does (l) mean?

Answer 8

Liquid

Question 9

What does (g) mean?

Answer 9

Gas

Question 10

What does (aq) mean?

Answer 10

Aqueous (dissolved in water)

Question 11

What happens when Lithium, Sodium or Potassium react with water?

Answer 11

They float (due to their low density) 
They produce bubbles of hydrogen gas

Question 12

As the reactivity of alkali metals increases further down the group, what happens when lithium is mixed with water?

Answer 12

It reacts quickly

Question 13

What happens when Sodium is mixed with water?

Answer 13

It reacts more vigorously with water and melts

Question 14

What happens when Potassium is mixed with water?

Answer 14

It reacts so vigorously that sparks are produced and a purple flame is seen