C8 Reactions Of Metals

Question 1

Why were lower reactivity metals discovered sooner

Answer 1

• They were able to be extracted in a pure form.
• More reactive metals have to be reduced with carbon or extracted via electrolysis

Question 2

Define what will happen in a displacement reaction

Answer 2

The more reactive element takes the place of the less reactive element in the compound

Question 3

What determines the reactivity of a metal

Answer 3

• How easily it forms an ion by loosing it’s outermost electron
• Metals loose electrons more easily the further the outermost electron is from the nucleus due to lower electrostatic forces

Question 4

Write a oxidation ionic half equation

Answer 4

Fe (s) —> Fe 2+ (aq) + 2e-

• OIL RIG (Iron looses electrons so is oxidised)

Question 5

Write a reduction ionic half equation

Answer 5

Cu 2+ (aq) + 2e- ——> Cu (s)

• OIL RIG (Copper gains electrons so is reduced)