CE Rev - Chem 2

In which reaction might we see an increase in mass?

• thermal decomposition

• displacement

• oxidation

• reversible reaction

What might I observe when reacting magnesium with sulfuric acid?

• melting

• fizzing

• sublimation

• dissolving

Chemical reactions all...

• ...are irreversible

• ....give out energy

• ....involve making / breaking bonds

• ...involve colour changes

What might you notice if you added water to anhydrous copper sulfate?

• gets hotter

• blue to white

• fizzing

• no reaction

The process which takes place when potassium permanganate is heated is

• burning

• decomposition

• dissolving

• neutralisation

When magnesium is added to dilute acid, the gas given off is...

• air

• hydrogen

• nitrogen

• oxygen

An oxide which has a pH value above 7 is

• carbon dioxide

• hydrogen

• magnesium oxide

• sulfur dioxide

The reaction between an acid and an alkali is best described as

• displacement

• neutralisation

• oxidation

• reduction

Washing-up liquid is a weak alkali. It could have a pH value of

• 3

• 5

• 9

• 12

When copper is heated strongly in an open dish, its mass will...

• decrease

• increase

• increase and then decrease

• stay the same