a levels chemistry best help

  • 25.1 Acids and Bases

    BySubarnam

    25.1 Acids and Bases 🎯 Learning outcomes Candidates should be able to: understand and use the terms conjugate acid and conjugate base define conjugate acid–base pairs, identifying such pairs in reactions define the terms pH, Ka, pKa and Kw mathematically and use them in calculations (Kb and the equation Kw = Ka × Kb will…

  • 23.4 Gibb’s Free Energy

    BySubarnam

    23.4 Gibbs Free Energy Change 🎯 Learning Outcomes Candidates should be able to: ✓ State and use the Gibbs equation ΔG⦵ = ΔH⦵ − TΔS⦵ ✓ Perform calculations using the equation ΔG⦵ = ΔH⦵ − TΔS⦵ ✓ State whether a reaction or process will be feasible, using the sign of ΔG ✓ Predict the effect…