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Balancing Equations – Ch. 9 – Key
Balance the following chemical equations.
1. 2 Na + I2 ( 2 NaI
2. 2 KClO3 ( 2 KCl + 3 O2
3. K3PO4 + 3 HCl ( 3 KCl + H3PO4
4. C3H8 + 5 O2 ( 3 CO2 + 4 H2O
5. 2 N2 + O2 ( 2 N2O
6. 2 KI + Cl2 ( 2 KCl + I2
7. 2 C2H6 + 7 O2 ( 4 CO2 + 6 H2O
8. 3 Mg(NO3)2 + 2 K3PO4 ( Mg3(PO4)2 + 6 KNO3
Write and balance the following chemical equations.
9. Nitrogen plus hydrogen produce ammonia (NH3). (Remember diatomic elements!)
N2 + 3H2 → 2NH3
10. Sodium oxide combines with water to form sodium hydroxide.
Na2O + H2O → 2NaOH
11. Sodium sulfate reacts with calcium nitrate to produce sodium nitrate and calcium sulfate. Na2SO4 + Ca(NO3)2 → 2NaNO3 + CaSO4
12. Zinc reacts with iron(III) chloride yielding zinc chloride plus iron.
3Zn + 2FeCl3 → 3ZnCl2 + 2Fe
13. Hydrogen plus oxygen produce water.
2H2 + O2 → 2H2O
14. Sodium reacts with magnesium chloride yielding sodium chloride plus magnesium.
2Na + MgCl2 → 2NaCl + Mg
15. Aluminum bromide plus chlorine yield aluminum chloride and bromine.
2AlBr3 + 3Cl2 → 2AlCl3 + 3Br2
16. Aluminum nitrate and sodium sulfide react to form aluminum sulfide and sodium nitrate. 2Al(NO3)3 + 3Na2S → Al2S3 + 6NaNO3
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