Reaction rates can be affected by...
- surface area
- use of a catalyst
Reaction rates can be found by...
- measuring the amount of reactants used, or
- measuring the amount of products formed
Exothermic reactions give out heat. Exothermic reactions ---> raised temps. decrease yields ---> lowered temps. increase yields
Endothermic reactions take in heat. Endothermic reactions ---> raised temps. decrease yields ---> lowered temps. decrease yields.
Electrolysis - where electricity is passed through the solution and it separates it into different substances.
Breaking up a compound (in solution or molten) using electricity.
Negative ions ------> positive electrode
Positive ions ------> negative electrode.
Copper can be purified by electrolysis. Electrolysis of sodium chloride solution produces...
- chlorine gas at the positive electrode
- hydrogen gas at the negative electrode
- sodium hydroxide solution
Neutralisation and forming salts = Acid + alkali = neutral solution
Reduction - is gain of electrons
Oxidation - is loss of electrons