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Chemistry 9701 Multiple choice questions
The bromide ions are strong enough reducing agents to reduce the concentrated sulphuric acid. In the process, the bromide ions are oxidised to bromine. Iodide ions are stronger reducing agents than bromide ions are. They are oxidised to iodine by the concentrated sulphuric acid. Concentrated... -
Chemistry 9701 Multiple choice questions
The answer is D. Kc = [SO3]2/[SO2]2[O2], we are told the [SO2] is double that of [O2], so I wrote that as 2x and x respectively, not forgetting the power for [SO2], giving 4x2 and x. Therefore, Kc = [6]2/[4x3] giving us 280 = 36/4x3. Therefore, x3 = 36/280 x 4 and take the cube root to find x...