IDENTIFYING REACTIONS

SYNTHESIS REACTIONS: Reactions in which two or more substances (elements or compounds) combine to make a more complex substance. Make a check () in the correct box next to each equation.

Equation / A synthesis reaction / Not a synthesis reaction
1. 2K + Br2 à 2KBr
2. 2H2O à 2H2 + O2
3. NaCl à Na + Cl
4. 4Au + 3O2 à 2Au2O3

DECOMPOSITION REACTIONS: Reactions in which a compound is broken down into simpler substances. Make a check () in the correct box next to each equation.

Equation / A decomposition reaction / Not a decomposition reaction
1. CuCl2 à Cu + Cl2
2. 3Hf + 2N2 à Hf3N4
3. Zn + 2HCl à ZnCl2 + H2
4. H2CO3 à H2O + CO2

SINGLE REPLACEMENT REACTIONS: Reactions which one element replaces another in a compound. Make a check () in the correct box next to each equation.

Equation / A single replacement reaction / Not a single replacement reaction
1. Zn + PbO à ZnO + Pb
2. C + 2S à CS2
3. 2Al + 6HCl à 2AlCl3 + 3H2
4. Fe + CuSO4 à FeSO4 + Cu

DOUBLE REPLACEMENT REACTIONS: Reactions which two elements in different compounds trade places. Make a check () in the correct box next to each equation.

Equation / A double replacement reaction / Not a double replacement reaction
1. Mg(OH2) + 2HCl à MgCl2 + 2H2O
2. Na2SO4 + BaCl2 à 2NaCl + BaSO4
3. 3Mg + N2 à Mg3N2
4. CuSO4 + H2S à H2SO4 + CuS

IDENTIFYING CHEMICAL REACTIONS

Ten chemical equations are listed below. Identify each kind of reaction: synthesis, decomposition, single replacement, or double replacement.

Equation / Kind of Reaction
1. N2 + 3H2 à 2NH3
2. 2Br2 + 2H2O à 4HBr + O2
3. Mg + HCl à MgCl + H
4. 2KBr +H2SO4 à K2SO4 + 2HBr
5. H2SO3 à H2O + SO2
6. Na2S + 2HCl à 2NaCl + H2S
7. 2Na + I2 à 2NaI
8. NaCl + AgNO3 à NaNO3 + AgCl
9. H2 + Cl2 à 2HCl
10. H2CO3 à H2O + CO2

BALANCING CHEMICAL REACTIONS

After completing the online sets, balance each of the following reactions.

___HgO + ___Cl2 à ___HgCl + ___O2

___Na + ___Br2 à ___NaBr

___Al2O3 à ___Al + ___O2

___KClO3 à ___KCl + ___O2

___H2O + ___Fe à ___ Fe2O3 + ___H2