Aqa A Level Chemistry Paper 1 Questions And Answers 100% Verified A+ Guaranteed

dynamic equilibrium {Ans: Forward and backward reactions take place at same rate so concentrations of products and reactants remain constant Only reached in closed system}Partial pressure {Ans: mole fraction x total pressure}Detection (TOF) {Ans: positive ions hit negatively charged plate and gain an electron which forms a current, the larger the current the higher the abundance}Solubility if group 2 sulphates {Ans: Solubility decreases down group}Electron configuration {Ans: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d10}Too strong adsorption {Ans: Molecules cannot move around active sites so less likely to meet another reactant Also products not desorbed}Effect of concentration on Kc {Ans: no effect}Multidentate {Ans: A type of ligand that can form many coordinate bonds with ions}Use of BaSO4 {Ans: Used as a tracer for x-rays Important that it is insoluble as it is safe to ingest}Properties if transition metals {Ans: -form complexes -form coloured ions -catalytic activity -variable oxidation state}