Chemistry Past Questions and Answers

Calculate the mass of sodium hydroxide in 5.00 dm<sup style='font-size: smaller;'>3</sup> of a 0.125 mol dm<sup style='font-size: smaller;'>-3</sup> solution [NaOH = 40 g mol]

Which of the following salt solutions will have a pH greater than 7?

What will happen if more heat is applied to the following system at equilibrium? X<sub style='font-size: smaller;'>2(g)</sub> + 3Y <sub style='font-size: smaller;'>2(g)</sub> ⇌ 2XY<sub style='font-size: smaller;'>3(g)</sub>; ∆H =-kJmol <sup style='font-size: smaller;'>-1</sup>

Equal amounts of marble chips are reacted separately with 100cm<sup style='font-size: smaller;'>3</sup> of hydrochloric acid of different concentrations . if all the marble chips reacted, which of the following remained the same in each case?

CuSO<sub style='font-size: smaller;'>4</sub> 5H<sub style='font-size: smaller;'>2</sub>O can be obtained from an aqueous solution of copper (ll) tetraoxosulphate (VI) by