1- Distinguish between accuracy and precision?
2- Classify each of the following reactions as a precipitation, acid-base
neutralization, or oxidation-reduction:
(a) Hg(NO3)2(aq) +2 Nal(aq) \rightarrow 2 NaNO3(aq) + HgI2(s)
(b)
2 HgO(s) \rightarrow 2 Hg(l) + O2(g)
(c) H3PO4(aq) +3 KOH(aq) \rightarrow K3PO4(aq) + 3 H2O(1)
3- What volume of 0.250 M H2SO4 is needed to react with 50.0 mL of 0.100
M NaOH? The equation is :
H2SO4(aq) + 2 NaOH(aq) \rightarrow Na2SO4(aq) + 2 H2O(1)
4- How many grams are in 0.0626 mol of NaHCO3, the main ingredient in
Alka-Seltzer tablets?