GCSE Chemistry

What’s inside

• When sodium reacts with chlorine to form sodium chloride, what happens to the sodium atom?
• During the electrolysis of molten lead bromide, which product forms at the cathode?
• What is the main effect of adding a catalyst to a reversible reaction?
• A substance travels 3.0 cm while the solvent front travels 5.0 cm in chromatography. What is its Rf value?
• When a reactive metal reacts with a dilute acid, the gas released is [____].
• The reactivity of Group 1 metals generally [____] as they are placed lower down the group.
• The empirical formula of magnesium oxide is [____].
• During electrolysis, reduction takes place at the [____].