Writing and Balancing Equations Worksheet # 1

Name: Writing and Balancing Equations Worksheet # 1

Write a balanced chemical equation for the following reactions:

1. Na + CuSO4  sodium sulfate + copper

2. Pb(NO3)2 + NaBr  Sodium nitrate + lead (II) bromide

3. KClO3  potassium chloride + oxygen

4. H2O  hydrogen + oxygen

5. HgO  mercury + oxygen

6. KI + Pb(NO3)2  lead (II) iodide + potassium nitrate

7. Al + O2  aluminum oxide

8. MgCl2 + NH4NO3  magnesium nitrate + ammonium chloride Name: Writing and Balancing Equations Worksheet #2 I. Counting Atoms

_____1. How many total atoms are there in 5 formula units of calcium hydroxide?

____2. How many atoms of oxygen are there in 7 molecules of oxygen gas?

II. Balancing Equations-Write balanced equations for each of the following reactions

l. Mg + O2  magnesium oxide

2. Fe + O2  iron (III) oxide

3. H2O + N2O3  HNO2

4. Na2O + H2O  sodium hydroxide

5. Fe + H2O  Fe3O4 plus hydrogen gas

6. Al + Pb(NO3)2  aluminum nitrate plus lead

7. Ca(OH)2 + HCl  calcium chloride and water

8. Na2SO3 + HCl  sodium chloride and water and sulfur dioxide. Predicting Products and Balancing Equations Worksheet #1 Identify the reaction type to the left of the problem number (synthesis, decomposition, and combustion). Predict the products and write a balanced equation.

______1. N2 + Ca 

______2. Propane + O2 

______3. K + Br2 

______4. Mg + F2 

______5. Ethane + O2 

______6. PbO2 + heat 

______7. BaCl2 + heat 

______8. Decane + O2 

______9. PbO + heat  Predicting and Balancing Equations Worksheet #2 Determine if the following chemicals react when they come into contact with each other. Identify the reaction type to the left of the problem number (single replacement or double replacement). If the reaction occurs predict the products and write a balanced equation using symbols (g), (aq), (l), (s) when appropriate. If there would be no reaction, write NO REACTION. For the following assume all compounds are aqueous (dissolved in water).

______1. NaBr + I2 

______2. Na3PO4 + Fe 

______3. Zn(NO3)2 + SrF2 

______4. Ca(NO3)2 + Na2SO4 

______5. Ca + AlCl3 

______6. Mg(NO3)2 + NaI  ______7. NiCO3 + Li 

______8. NH4ClO3 + Mg(OH)2 

______9. K + HCl 

______10. MgF2 + LiCl 

______11. Li + MgCl2 

______12. Cl2 + BaF2 

______13. Na + Li2SO3 

______14. AlI3 + KCl  Chemical Reactions Test Review

1. Define and give examples of a physical property, chemical property, physical change, and chemical change.

2. What are four indicators of a chemical change?

3. Define solid, liquid, gas, and plasma.

4. Is reactivity an extensive or intensive property?

5. Define exothermic reactions and endothermic reactions.

Write and balance the following equations using symbols (g), (aq), (l), (s) when appropriate. Identify the reaction to the left of the number (synthesis, decomposition, combustion, single replacement, or double replacement). If a reaction would not occur write NO REACTION.

______1. MgBr2 (aq) + Cl2 (g) 

______2. Na2S (aq) + Fe (s) 

______3. Al2S3 (aq) + SrF2 (aq) 

______4. Ca(NO3)2 (aq) + Na3PO4 (aq) 

______5. Ca (s) + AlCl3 (aq) 

______6. MgCl2 (aq) + I2 (s) 

______7. MgCl2 (s) + heat  ______8. Ca(NO2)2 (aq) + LiI (aq) 

______9. Br2 (g) + Mg (s) 

______10. Mg(ClO3)2 (aq) + K (s) 

______11. ethane + O2 

______12. KClO3 (aq) + Mg(OH)2 (aq) 

______13 LiOH (aq) + Na2CrO4 (aq) 

Redox Reactions (Remember that oxidation is losing electrons and reduction is gaining electrons.) 30. Assign, using page 591, oxidation states to the following:

3+ a. Li b. Fe c.HCl d. SO2 e. HBr

31. Determine if the following are oxidation half reactions or reduction half reactions. a. Ag  Ag1+ + 1e- b. Al3+ + 3e-  Al

32. Assign oxidation states to the following and determine if the following equations are redox reactors or not.

a. H2 + Br2  2HBr b. CuO + Mg  MgO + Cu

c. 2CuO  O2 + 2Cu d. 8H2 + S8  8H2S Redox Reactions Worksheet 1. Calculate the oxidation state of each element in each of the following:

a. P2O5 b. ZnO c. CuO d. NH3 e. MgF2

f. HgCl2 g. CO2 h. I2O7

2. Assign oxidation numbers to each element and determine which of the following are redox reactions. Balance all reactions.

a. KNO3 → KNO2 + O2

b. H2 + CuO → Cu + H2O

c. NaOH + HCl → NaCl + H2O

d. I2 + H3SO3 + H2O → HI + H2SO4