Student completing Enthalpy of Solution Cycle for Magnesium Chloride... #EnthalpyOfSolution #OnlineALevelChemistryTutor...

Sulphuric Acid is reduced by Iodide ions to form Sulphur Dioxide. Iodide ions are oxidised to Iodine. Reduction Half Equation H₂SO₄ -----> SO₂ 1. Balance the species that has been oxidised or reduced. In this case the sulphur has been reduced from +6 to +4. The sulphur atoms are balanced. 2. Balance oxygen using H₂O There are 4 on LHS and 2 on RHS so add 2 H20 to the RHS H₂SO₄ ----> SO₂ + 2 H₂O 3. Balance hydrogen atoms (H+) There are 2 on LHS and 4 on RHS

If you have worked out the MOLES of two reactants then the limiting reagent is the one with less moles. Sorted? Well, it depends. If the...

Electron Energy Level Filling Atoms Remember for atoms fill the 4s before 3d... 1s2s2p3s3p4s3d..(In order of increasing energy) So...