David wants to know the effect of limiting concentration of a reactant. a) Define a limiting reagent. b) Calcium chloride reacts with sodium carbonate to form a white precipitate of

calcium carbonate, as follows: \mathrm{CaCl}_{2}(\mathrm{aq})+\mathrm{Na}_{2} \mathrm{CO}_{3}(\mathrm{aq})->\mathrm{CaCO}_{3}(\mathrm{~s})+2 \mathrm{NaCl} If 1 mol of CaCl2 is mixed with 0.5 mol of Na2CO3, which one is the limiting reagent?