P5.1 Reactivity Series

Question 1

What is the pH scale, and what are its minimum and maximum values?

Answer 1

The pH scale is a measure of how acidic or alkaline a solution is. It ranges from 0 (very acidic) to 14 (very alkaline).

Question 2

What happens to most metals in ores and how they combined

Answer 2

Most metals ores are chemically bonded to other elements in compounds. Many of these metals have been oxodised by oxygen in the air to form oxides

Iron+oxygen = iron oxide

Question 3

What happens to reactivity of metals in group 1 when mixed with water

Answer 3

The reactivity of metals increases you go down group 1 so potassium most reactive then sodium then lithium.

Magnesium lies somewhere between copper and lithium in reactivity series. So if magneisum is left in a beaker of water, it takes serveral days to get nough gas witha lighted spill. The ‘pop shows the gas is a hydrogen

Question 4

Pottasium,sodium,lithium,calcium reaction with water and dilute acid

Answer 4

Water-fizzing, giving of hydrogen gas,leaving an alkaline solution of metal hydroxide

Dilute acid-explode

Question 5

Magnesium,aliminium,zinc,iron reaction with water and dilute acid

Answer 5

Water-very slow reaction
Dilute acid-fizz,giving of hydrogen gas and forming a salt

Question 6

Tin and lead reaction with water and dilute acid

Answer 6

Water-slight resction with steam
Reaction with dilute acid-react slowly