1. Beryllium metal (has no charge at first)
#13 Complete and balance this equation
for a combination reaction:
Be + O Be O +2 -2 2 2 1 1
Beryllium metal (has no charge at first)
combines with oxygen gas (no charge)
to form Beryllium Oxide (ionic compound
with charges)
2Be + O BeO

2. #14 Write and balance the equation for the
formation of magnesium nitride (Mg3N2) from
its elements. 3
Mg N Mg3N2 1 2
3Mg N Mg3N2

3. HI H + I 2HI H2 + I2 #15. Complete and balance this decomposition
reaction: HI 2
H I 2 2
2HI H I2

4. #16 Write the formula for the binary
(two elements) compound that decomposes
to the products H2 and Br2. 2
HBr H Br2
2HBr H Br2

5. Yes, iron is stronger so it will replace lead.
#17 Complete the equation for these single-
replacement reactions in aqueous solution.
Balance each equation. Write “no reaction” if a
reaction does not occur. Use the activity series.
a. Fe(s) + Pb(NO3)2 (aq) +2 -1
Pb(s) Fe(NO3)2 (aq)
Yes, iron is stronger so it will
replace lead.

6. Yes, Chlorine is stronger so it will replace Iodine.
#17 Complete the equation for these single-
replacement reactions in aqueous solution.
Balance each equation. Write “no reaction” if a
reaction does not occur. Use the activity series.
b. Cl2(g) + NaI (aq)
Stronger
Cl2 + 2NaI I2(s) + 2NaCl (aq)
Yes, Chlorine is stronger so it will
replace Iodine.
Weaker

7. Ca(s)+ 2H2O(l) H2(g) + Ca(OH)2 (aq)
#17 Complete the equation for these single-
replacement reactions in aqueous solution.
Balance each equation. Write “no reaction” if a
reaction does not occur. Use the activity series.
c. Ca(s) + H2O (l)
Stronger
Ca(s)+ 2H2O(l) H2(g) + Ca(OH)2 (aq)
Yes, Calcium is stronger so it will
replace hydrogen.
Weaker

8. 3 3 #18 Write the products of these double-
replacement reactions. Then balance each
equation: 3
a NaOH (aq) Fe(NO3)3 (aq) 3
NaNO3 (aq) Fe(OH)3 (s)

9. 3 2 6 #18 Write the products of these double-
replacement reactions. Then balance each
equation: 3 2
b Ba(NO3)2 (aq) H3PO4 (aq) 6
Ba3(PO4)2 (s) HNO3 (aq)

10. 3 3 #19 Write a balanced equation for each reaction:
a. KOH(aq) H3PO4 (aq) 3 3
K3PO4 (aq) H2O (l)

11. 3 2 6 #19 Write a balanced equation for each reaction:
b. H2SO4(aq) Al(OH)3 (aq) 3 2 6
Al2(SO4)3 (aq) H2O (l)