1. Chemistry 2 Problem Set 3 33/30pts
Instruction: Read the instructions carefully. Use
black/blue pen. Use correction fluid when
changing an aswer. (1pt each)
A. Balance the following chemical equations.
1. H2SO4 + 2NaCN →2HCN+ Na2SO4
2. 2KClO3 (s) + heat →2KCl(s)+ O2 (g)
3. Ca (s) + 2H2O (l) → Ca(OH)2 (aq) + H2 (g)
4. C10H8+ 12O2 (g) → 10CO2 (g) + 4H2O (g)
5. C12H22O11 (s) + 8KClO3 (s) →10KCl(s)+
12CO2 (g) + 11H2O(g)
B. Write the formula of the products if any is
formed. Write NR if no reaction occurs. Balance
the respective equations. (2pts each)
1. 2K(s) + ZnCl2(aq) → 2KCl + Zn
2. Fe(s) + Na3PO4(aq) → NR
3. sodium nitrateaq+potassium phosphate(aq)→NR aq prods
4. silver chloride(s) + caustic soda(aq) → NR
5. Cl2(aq) + HF(aq) → NR F is more reactive
C. Write the balanced net ionic equations of test
B items. (Bonus 3pts)
2K(s) + Zn2+(aq) → 2K+ + Zn
D. Use the following chemical reactions to
prepare an activity series for the following
hypothetical elements H, E, C, Oand M. (5pts)
2H + 3M2+ → 2H3+ + 3M
O+ + E → O + E+
H + C+ → no reaction
M+ E+ → no reaction
H + 3E+ → H3+ + 3E
M +2O+ → M2+ + 2O
Most reactive _C_, _H_, _E_, _M_, _O_ Least
E. Write the balanced chemical equation of the
following reactions and identify the type of
reaction. (2pts each.)
1. Aluminum metal is oxidized by oxygen
from the air. 2Al + 3O2 → Al2O3 Synthesis
2. Sodium oxide reacts with carbon dioxide to
form sodium carbonate.
Na2O + CO2→Na2CO3 Synthesis
3. Limestone is heated. CaCO3→CaO + CO2
Decomposition
4. A solution of hydrochloric acid reacts with a
solid calcium bicarbonate producing a solid,
a liquid and a gas.2HCl+Ca(HCO3)2→
CaCl2+2H2O+2CO2 Double Displacement
and Decompositon
5. Complete combustion of ethyl alcohol
CH3CH2OH+O2→H2O+CO2 Combustion