Reactions Of Metals with Water

Question 1

Lithium

Answer 1

Appearance before reaction=dull dark grey on outside, shiny and silver when cut
During reaction with water
Floats and moves around, fizzing/effervescing
Least reactive
Lithium+water -> lithium hydroxide +hydrogen

Question 2

Sodium

Answer 2

Appearance before reaction
Dull dark grey on outside, shiny and silver when cut
Floats and moves around, flame, fizzes and melts into a sphere
Sodium + water -> sodium hydroxide + hydrogen

Question 3

Potassium

Answer 3

Dull dark grey, shiny inside tarnishes quickly
Floats and moves around quickly, fizzing and crackling
Gives off lilac flame as it reacts
Potassium + water -> potassium hydroxide + hydrogen

Question 4

Is there a pattern?

Answer 4

Yes
Grey to start, each one easier to cut and tarnish faster than last
Reactions become more violent up the reactivity series

Question 5

They are all called alkali metals……

Answer 5

So when reacted to water form an alkali

Question 6

General word equation

Answer 6

Metal+ water -> metal hydroxide + hydrogen

Question 7

Calcium

Answer 7

Calcium + water-> calcium hydroxide + hydrogen