Question

balancing equations
starting with the skeleton equations, balance the following equations by adding coefficients where appropriate.

1. \\(\text{h}_2 + \text{f}_2 \

ightarrow \text{hf}\\)

1. \\(\text{sn} + \text{o}_2 \

ightarrow \text{sno}\\)

1. \\(\text{mgcl}_2 \

ightarrow \text{mg} + \text{cl}_2\\)

1. \\(\text{kno}_3 \

ightarrow \text{kno}_2 + \text{o}_2\\)

1. \\(\text{bn} + \text{f}_2 \

ightarrow \text{bf}_3 + \text{n}_2\\)

1. \\(\text{cui}_2 + \text{fe} \

ightarrow \text{fei}_2 + \text{cu}\\)

1. \\(\text{li} + \text{h}_2\text{o} \

ightarrow \text{lioh} + \text{h}_2\\)

1. \\(\text{nh}_3 + \text{o}_2 \

ightarrow \text{n}_2 + \text{h}_2\text{o}\\)

1. \\(\text{v}_2\text{o}_5 + \text{ca} \

ightarrow \text{cao} + \text{v}\\)

1. \\(\text{c}_9\text{h}_8\text{o}_4 + \text{o}_2 \

ightarrow \text{co}_2 + \text{h}_2\text{o}\\)

1. \\(\text{h}_2\text{s} + \text{pbcl}_2 \

ightarrow \text{pbs} + \text{hcl}\\)

1. \\(\text{c}_3\text{h}_7\text{oh} + \text{o}_2 \

ightarrow \text{co}_2 + \text{h}_2\text{o}\\)

1. \\(\text{zn} + \text{cuso}_4 \

ightarrow \text{cu} + \text{znso}_4\\)

1. \\(\text{c}_6\text{h}_{12}\text{o}_6 + \text{o}_2 \

ightarrow \text{co}_2 + \text{h}_2\text{o}\\)

1. \\(\text{c}_2\text{h}_5\text{oh} + \text{o}_2 \

ightarrow \text{co}_2 + \text{h}_2\text{o}\\)

1. \\(\text{al} + \text{h}_2\text{so}_4 \

ightarrow \text{h}_2 + \text{al}_2(\text{so}_4)_3\\)

1. \\(\text{fecl}_3 + \text{ca(oh)}_2 \

ightarrow \text{fe(oh)}_3 + \text{cacl}_2\\)

1. \\(\text{pb(no}_3)_2 + \text{k}_2\text{cro}_4 \

ightarrow \text{pbcro}_4 + \text{kno}_3\\)

1. \\(\text{cd(no}_3)_2 + (\text{nh}_4)_2\text{s} \

ightarrow \text{cds} + \text{nh}_4\text{no}_3\\)

1. \\(\text{ca(oh)}_2 + \text{nh}_4\text{cl} \

ightarrow \text{nh}_3 + \text{cacl}_2 + \text{h}_2\text{o}\\)

Explanation:

Identify the balancing goal

Balance each chemical equation.
Ensure equal atom counts.

Balance equations 1 to 5

1. \(\text{H}_2 + \text{F}_2

ightarrow 2\text{HF}\)

1. \(2\text{Sn} + \text{O}_2

ightarrow 2\text{SnO}\)

1. \(\text{MgCl}_2

ightarrow \text{Mg} + \text{Cl}_2\) (Already balanced)

1. \(2\text{KNO}_3

ightarrow 2\text{KNO}_2 + \text{O}_2\)

1. \(2\text{BN} + 3\text{F}_2

ightarrow 2\text{BF}_3 + \text{N}_2\)

Balance equations 6 to 10

1. \(2\text{CuI}_2 + \text{Fe}

ightarrow \text{FeI}_4 + 2\text{Cu}\)

1. \(2\text{Li} + 2\text{H}_2\text{O}

ightarrow 2\text{LiOH} + \text{H}_2\)

1. \(4\text{NH}_3 + 3\text{O}_2

ightarrow 2\text{N}_2 + 6\text{H}_2\text{O}\)

1. \(\text{V}_2\text{O}_5 + 5\text{Ca}

ightarrow 5\text{CaO} + 2\text{V}\)

1. \(2\text{C}_9\text{H}_6\text{O}_4 + 17\text{O}_2

ightarrow 18\text{CO}_2 + 6\text{H}_2\text{O}\)

Balance equations 11 to 15

1. \(\text{H}_2\text{S} + \text{PbCl}_2

ightarrow \text{PbS} + 2\text{HCl}\)

1. \(\text{C}_3\text{H}_7\text{OH} + \frac{9}{2}\text{O}_2

ightarrow 3\text{CO}_2 + 4\text{H}_2\text{O} \Rightarrow 2\text{C}_3\text{H}_7\text{OH} + 9\text{O}_2
ightarrow 6\text{CO}_2 + 8\text{H}_2\text{O}\)

1. \(\text{Zn} + \text{CuSO}_4

ightarrow \text{Cu} + \text{ZnSO}_4\) (Already balanced)

1. \(\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2

ightarrow 6\text{CO}_2 + 6\text{H}_2\text{O}\)

1. \(\text{C}_2\text{H}_5\text{OH} + 3\text{O}_2

ightarrow 2\text{CO}_2 + 3\text{H}_2\text{O}\)

Balance equations 16 to 20

1. \(2\text{Al} + 3\text{H}_2\text{SO}_4

ightarrow 3\text{H}_2 + \text{Al}_2(\text{SO}_4)_3\)

1. \(2\text{FeCl}_3 + 3\text{Ca(OH)}_2

ightarrow 2\text{Fe(OH)}_3 + 3\text{CaCl}_2\)

1. \(\text{Pb(NO}_3)_2 + \text{K}_2\text{CrO}_4

ightarrow \text{PbCrO}_4 + 2\text{KNO}_3\)

1. \(\text{Cd(NO}_3)_2 + (\text{NH}_4)_2\text{S}

ightarrow \text{CdS} + 2\text{NH}_4\text{NO}_3\)

1. \(\text{Ca(OH)}_2 + 2\text{NH}_4\text{Cl}

ightarrow 2\text{NH}_3 + \text{CaCl}_2 + 2\text{H}_2\text{O}\)

Answer:

No.	Balanced Chemical Equation

| 1 | \(\text{H}_2 + \text{F}_2
ightarrow 2\text{HF}\) |
| 2 | \(2\text{Sn} + \text{O}_2
ightarrow 2\text{SnO}\) |
| 3 | \(\text{MgCl}_2
ightarrow \text{Mg} + \text{Cl}_2\) |
| 4 | \(2\text{KNO}_3
ightarrow 2\text{KNO}_2 + \text{O}_2\) |
| 5 | \(2\text{BN} + 3\text{F}_2
ightarrow 2\text{BF}_3 + \text{N}_2\) |
| 6 | \(2\text{CuI}_2 + \text{Fe}
ightarrow \text{FeI}_4 + 2\text{Cu}\) |
| 7 | \(2\text{Li} + 2\text{H}_2\text{O}
ightarrow 2\text{LiOH} + \text{H}_2\) |
| 8 | \(4\text{NH}_3 + 3\text{O}_2
ightarrow 2\text{N}_2 + 6\text{H}_2\text{O}\) |
| 9 | \(\text{V}_2\text{O}_5 + 5\text{Ca}
ightarrow 5\text{CaO} + 2\text{V}\) |
| 10 | \(2\text{C}_9\text{H}_6\text{O}_4 + 17\text{O}_2
ightarrow 18\text{CO}_2 + 6\text{H}_2\text{O}\) |
| 11 | \(\text{H}_2\text{S} + \text{PbCl}_2
ightarrow \text{PbS} + 2\text{HCl}\) |
| 12 | \(2\text{C}_3\text{H}_7\text{OH} + 9\text{O}_2
ightarrow 6\text{CO}_2 + 8\text{H}_2\text{O}\) |
| 13 | \(\text{Zn} + \text{CuSO}_4
ightarrow \text{Cu} + \text{ZnSO}_4\) |
| 14 | \(\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2
ightarrow 6\text{CO}_2 + 6\text{H}_2\text{O}\) |
| 15 | \(\text{C}_2\text{H}_5\text{OH} + 3\text{O}_2
ightarrow 2\text{CO}_2 + 3\text{H}_2\text{O}\) |
| 16 | \(2\text{Al} + 3\text{H}_2\text{SO}_4
ightarrow 3\text{H}_2 + \text{Al}_2(\text{SO}_4)_3\) |
| 17 | \(2\text{FeCl}_3 + 3\text{Ca(OH)}_2
ightarrow 2\text{Fe(OH)}_3 + 3\text{CaCl}_2\) |
| 18 | \(\text{Pb(NO}_3)_2 + \text{K}_2\text{CrO}_4
ightarrow \text{PbCrO}_4 + 2\text{KNO}_3\) |
| 19 | \(\text{Cd(NO}_3)_2 + (\text{NH}_4)_2\text{S}
ightarrow \text{CdS} + 2\text{NH}_4\text{NO}_3\) |
| 20 | \(\text{Ca(OH)}_2 + 2\text{NH}_4\text{Cl}
ightarrow 2\text{NH}_3 + \text{CaCl}_2 + 2\text{H}_2\text{O}\) |