Answer to Question #234669 in General Chemistry for Cha

Question

In each of the following cases, determine which reactant is present in excess, and tell how many moles in excess it is.

a. HNO3 +NaOH= NaNO3+ H20; there are 0.90 mol HNO3, 0.85 mol NaOH

b. Ca(HCO3)2 +2 HCL = CaCl2+ 2CO2+ 2H2O; There are 2.5 mol HCl, 1 mol Ca(HCO3)2

Please, show your complete soluyion. Thank you!

Answer 1

a) HNO3 + NaOH = NaNO3 + H2O is a neutralization reaction (also a double displacement reaction). The strong acid (HNO3) and strong base react to produce a salt (NaNO3) and water (H2O).

b) Calcium carbonate is not very soluble in water. This is an acid-base reaction (neutralization): CaCO3 is a base, HCl is an acid.