2. write a skeleton and a balanced chemical equation for each chemical reaction. a-12 - 2 marks for the…
2. write a skeleton and a balanced chemical equation for each chemical reaction. a-12 - 2 marks for the skeleton equation - 2 marks for the balanced equation a) calcium +potassium chloride → calcium chloride + potassium b) magnesium chloride + sodium nitrate → magnesium nitrate + sodium chloride c) potassium sulfate + lead(ii) nitrate → potassium nitrate + lead(ii) sulfate
Answer
Explanation:
Step1: Write skeleton equation for a
Write reactants and products as - is. $Ca + KCl\rightarrow CaCl_2+K$
Step2: Balance equation for a
Balance Cl atoms first, then others. $Ca + 2KCl\rightarrow CaCl_2+2K$
Step3: Write skeleton equation for b
Write reactants and products as - is. $MgCl_2 + NaNO_3\rightarrow Mg(NO_3)_2+NaCl$
Step4: Balance equation for b
Balance Cl and NO₃⁻ groups. $MgCl_2 + 2NaNO_3\rightarrow Mg(NO_3)_2+2NaCl$
Step5: Write skeleton equation for c
Write reactants and products as - is. $K_2SO_4 + Pb(NO_3)_2\rightarrow KNO_3+PbSO_4$
Step6: Balance equation for c
Balance K and NO₃⁻ groups. $K_2SO_4 + Pb(NO_3)_2\rightarrow 2KNO_3+PbSO_4$
Answer:
a) Skeleton: $Ca + KCl\rightarrow CaCl_2+K$; Balanced: $Ca + 2KCl\rightarrow CaCl_2+2K$ b) Skeleton: $MgCl_2 + NaNO_3\rightarrow Mg(NO_3)_2+NaCl$; Balanced: $MgCl_2 + 2NaNO_3\rightarrow Mg(NO_3)_2+2NaCl$ c) Skeleton: $K_2SO_4 + Pb(NO_3)_2\rightarrow KNO_3+PbSO_4$; Balanced: $K_2SO_4 + Pb(NO_3)_2\rightarrow 2KNO_3+PbSO_4$