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Balancing Chemical Equations Test Questions

Chemistry Test Questions

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Balancing chemical equations is a basic skill in chemistry. This collection of ten chemistry test questions tests your ability to balance a chemical reaction.

Question 1

__ AgI + __ Na2S → __ Ag2S + __ NaI

Question 2

__ Ba3N2 + __ H2O → __ Ba(OH)2 + __ NH3

Question 3

__ CaCl2 + __ Na3PO4 → __ Ca3(PO4)2 + __ NaCl

Question 4

__ FeS + __ O2 → __ Fe2O3 + __ SO2

Question 5

__ PCl5 + __ H2O → __ H3PO4 + __ HCl

Question 6

__ As + __ NaOH → __ Na3AsO3 + __ H2

Question 7

__ Hg(OH)2 + __ H3PO4 → __ Hg3(PO4)2 + __ H2O

Question 8

__ HClO4 + __ P4O10 → __ H3PO4 + __ Cl2O7

Question 9

__ CO + __ H2 → __ C8H18 + __ H2O

Question 10

__ KClO3 + __ P4 → __ P4O10 + __ KCl

Answers

1. 2 AgI + 1 Na2S → 1 Ag2S + 2 NaI
2. 1 Ba3N2 + 6 H2O → 3 Ba(OH)2 + 2 NH3
3. 3 CaCl2 + 2 Na3PO4 → 1 Ca3(PO4)2 + 6 NaCl
4. 4 FeS + 7 O2 → 2 Fe2O3 + 4 SO2
5. 1 PCl5 + 4 H2O → 1 H3PO4 + 5 HCl
6. 2 As + 6 NaOH → 2 Na3AsO3 + 3 H2
7. 3 Hg(OH)2 + 2 H3PO4 → 1 Hg3(PO4)2 + 6 H2O
8. 12 HClO4 + 1 P4O10 → 4 H3PO4 + 6 Cl2O7
9. 8 CO + 17 H2 → 1 C8H18 + 8 H2O
10. 10 KClO3 + 3 P4 → 3 P4O10 + 10 KCl

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