C5 - Chemical Changes

Question 1

What is Oxidation/Reduction?

Answer 1

Oxidation - when a substance gains Oxygen

Reduction - when a substance loses Oxygen

Question 2

What is a Displacement Reaction?

Answer 2

A reaction where a more reactive metal displaces a less reactive metal from a compound.

Question 3

How are unreactive metals found in Earth?

Answer 3

In their natural state (“native”).

Question 4

How are metals more reactive than carbon extracted?

Answer 4

By Electrolysis

Question 5

How are Oxidation & Reduction defined in terms of Electron Transfer?

Answer 5

Oxidation - LOSS of Electrons

Reduction - GAIN in Electrons [OILRIG]

Question 6

Which metals in the reactivity series will react with acid?

Answer 6

Those above Hydrogen

Question 7

What is the general equation for the reaction between a metal oxide and acid?

Answer 7

Metal Oxide + Acid → a Salt + Water

Question 8

What is a REDOX Reaction?

Answer 8

A reaction where both Oxidation and Reduction occurs.

Question 9

What is an Alkali?

Answer 9

A soluble base - produces hydroxide ions in aqueous solutions.

Question 10

What is the pH scale?

Answer 10

The measure of acidity/alkalinity of a solution.