B) In a laboratory procedure for preparing ZnSO4, a solid X was added with stirring to warm, dilute H2SO4 until no more of it
dissolved: Excess of X was removed from the reaction
mixture. The solution of ZnSO4 obtained was concentrated
to a small volume and then set aside.
(i) Suggest three substances which X could be.
(ii) Name the method used for removing excess of X.
(iii) What method was used to concentrate the ZnSO4
A(aq)
4(aq)
(iv) State what later appeared in the concentrated Znso,
that was set aside.
[ 6 marks

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

What is true for a substance that releases energy

Percent ionization for a weak acid (ha) is determined by the following formula: percent ionization=[ha] ionized[ha] initial×100%for strong acids, ionization is nearly complete (100%) at most concentrations. however, for weak acids, the percent ionization changes significantly with concentration. the more diluted the acid is, the greater percent ionization.a certain weak acid, ha, has a ka value of 9.4×10? 7.part acalculate the percent ionization of ha in a 0.10 m solution.part bcalculate the percent ionization of ha in a 0.010 m solution