Aqa A Level Chemistry Paper 1 Exam Questions (1428 Terms) With Verified Definitions Updated 2024

Give the equation when sodium bromide reacts with concentrated sulphuric acid and explain the further steps and give observations {Ans: H2SO4 + NaBr ---> HBr + NaHSO4 The concentrated sulphuric acid further oxidises the HBr to decompose it into Bromine and hydrogen gas/water and sulphuric acid is reduced to sulfur dioxide gas 2HBr + H2SO4 --> Br2 + SO2 + 2H2O Br2 as a reddish brown gas HBr white misty fumes SO2 choking gas}What is the equation for thermal energy transferred? {Ans: q = m x c x ΔT}What are strong acids? {Ans: Strong acids are acids that fully ionise in aqueous solutions}What colour is a silver bromide precipice {Ans: AgBr is a cream precipitate}What is kP only valid for? {Ans: Kp is only valid for one temperature as changing the temperature will change equilibrium position so Kp changes too}What does the volume of an ideal gas depend on? {Ans: Pressure Temperature}Which barium compound is used as a contrast for radiography {Ans: Barium sulfate}Give the equations for manganate's redox cycle (+2->+3->+2) when acting as a catalyst in the reaction between manganate (VII) and oxalate {Ans: 4[Mn]2+ (aq) + [MnO4]- + 8H+ -->