AS & A Level Chemistry (9701) — October–November 2024, Paper 42
8 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →(a) The equation for reaction 1 is shown. reaction 1: X - 2Y Reaction 1 is first order with respect to the concentration of X. The half-life of the reaction, t1/2, is 900 s at 20…
Answer this question and get it marked →(a) Predict and explain the variation in enthalpy change of hydration for the ions Na+, Mg2+ and Al3+.
Answer this question and get it marked →(a) The pH of a saturated solution of calcium hydroxide is 12.35 at 298 K. (a)(i) Show that the concentration of hydroxide ions in a saturated solution of calcium hydroxide is…
Answer this question and get it marked →Transition metal atoms and transition metal ions form complexes by combining with species called ligands. (a) When NaOH(aq) is added to an aqueous solution containing [Co(H2O)6]2+…
Answer this question and get it marked →Ni2+ ions form a number of different complex ions, including [Ni(H2O)6]2+, [Ni(NH3)6]2+ and [Ni(en)3]2+. The abbreviation en represents 1,2-diaminoethane. The numerical values of…
Answer this question and get it marked →Fig. 6.1 shows two reactions of ethanedioic acid, HOOCCOOH. HOOCCOOH reacts with an excess of SOCl2 to form organic product G. HOOCCOOH also reacts to give 2CO2 + H2O. (a)(i) Draw…
Answer this question and get it marked →Benzene reacts with chlorine gas to form chlorobenzene. This reaction can be described as the reaction between benzene molecules and Cl+ ions. The Cl+ ions are formed by adding a…
Answer this question and get it marked →The amino acid serine, HOCH2CH(NH2)COOH, exists in two optically active forms. These optical isomers, isomer P and isomer Q, are shown in Fig. 8.1 as three-dimensional structures…
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