Aqa A-Level Chemistry - Group 2 |21 Questions| With Correct Answers.

Atomic Radius {Ans: Increases. Trend in atomic radius down the group. This trend is due to more orbitals and a weaker nuclear charge as the charge is offset by the shielding that has come about from more orbitals}What do you add to the solution before adding BaCl2 to ensure that no CO2 is formed? {Ans: HCl}When a chlorate in group 2 reacts with sodium hydroxide: {Ans: XCl2 + 2NaOH -> 2NaCl + X(OH)2 HINT: Hydroxides}Pure Ti Extraction Equation {Ans: TiCl4 + 2Mg -> Ti + 2MgCl2}Uses of Mg(OH)2 {Ans: Treats indigestion}Equation for Wet Scrubbing with CaCO3 {Ans: CaCO3(s) + 2H2O(l) + SO2(g) -> CaSO3(s) + 2H2O(l) + CO2(g)}What colour precipitate is formed with the following reaction? BaCl2 + Na2SO4 -> 2NaCl + BaSO4 {Ans: White}Reaction of magnesium with steam {Ans: Mg(s) + H2O(g) -> MgO(s) + H2(g)}First ionisation energy {Ans: Decreases. Trend in first ionisation energies down the group. This is because the electrons get further from the nucleus so has a weaker pull from the nucleus}Trend in solubility of sulphates going down the group {Ans: Decreases}Reactivity {Ans: Increases. Trend in reactivity down the group. This is due to