Chemistry Paper 2 Hard Questions - Chemistry Edexcel IGCSE

A measure of how much solute will dissolve in a solvent

• Solubility

• Solution

• Solvent

• Solute

Solubility (g per 100g of solvent) =

• (mass of solid/mass of water removed) x 100

• (mass of solution/mass of solid removed) x 100

• mass of water removed/mass of solution

• mass of water removed/mass of solid

The breaking down of a substance using electricity

A molten or dissolved ionic compound

Cathode

• Positive electrode

• Negative electrode

Anode

• Positive electrode

• Negative electrode

How many sources of ions are there in molten ionic compounds?

What must you clean your electrodes with before using them?

In aqueous solutions, what will be produced at the cathode if metal ions are present and the metal is more reactive than hydrogen?

• Hydrogen gas

• A solid layer of the pure metal

• Halide

• Oxygen gas

In aqueous solutions, what will be produced at the cathode if metal ions are present and the metal is less reactive than hydrogen?

• Hydrogen gas

• A solid layer of the pure metal

• Halide

• Oxygen gas