homeworkchapter08.htmlTEXTsfri,i F.J. DeHoratius Chpater 8 Homework Mod Chem

Homework Chapter 8


Chapter 8, 8.1

1. Describe the differences between word equations, formula equations, and chemical equations.

2. Write word and formula equations for the reaction in which aqueous solutions of sulfuric acid and sodium hydroxide react to form aqueous sodium sulfate and water.

3. For the following reaction: hydrogen sulfide gas and oxygen gas react to produce sulfur dioxide gas and water vapor, give the
a) word equation:
b) formula equation:
c) chemical equation

4. Write the chemical equation for each of the following reactions:
a) ammonium chloride + calcium hydroxide ---> calcium chloride + ammonia + water
b) hexane, C6H14, + oxygen ---> carbon dioxide and water

5. List the four observations that indicate that a chemical reaction may be taking place.

6. List the three requirements for a correctly written chemical equation.

7. Define each of the following:
a) aqueous solution
b) catalyst
c) reversible reaction

8. How many atoms of each element are represented in each of the following:
a) 2N2
b) 2H2O
c) 4HNO3
d) 2Ca(OH)2
e) 3Ba(ClO3)2
f) 5Fe(NO3)2
g) 4Mg(PO4)2
h) 2(NH4)2SO4
i) 6Al2(SeO4)3
j) 4C3H8

9. Write the chemical equation that relates to each of the following word equations. Include symbols for physical states in the equation:
a) solid zinc sulfide + oxygen gas ---> solid zinc oxide + sulfur dioxide gas
b) hydrochloric acid + aqueous magnesium hydroxide ---> aqueous magnesium chloride + water
c) nitric acid + aqueous calcium hydroxide ---> aqueous calcium nitrate + water

10. Write the chemical equations for each of the following sentences:
a) aluminum reacts with oxygen to produce aluminum oxide
b) phosphoric acid, H3PO4, is produced through the reaction between tetraphosphorus decoxide and water.
c) iron (III) oxide reacts with carbon monoxide to produce iron and carbon dioxide.

Chapter 8, 8.2

1. given the equation

4 NH3 + 3 O2 ---> 2 N2 + 6 H2O

a) If you used 3.0 mol of O2, how many moles of each of the other substance would be used/produced;

b) If you used 8.0 mol of NH3, how many moles of each of the other substance would be used/produced;

c) If you used 1.0 mol of N2, how many moles of each of the other substance would be used/produced;

d) If you used .4 mol of H2O, how many moles of each of the other substance would be used/produced.

2. How many moles of HCl can be made from 6.16 mol of H2 and an excess of Cl2, given the equation

H2 + Cl2 ---> 2 HCl

Chapter 8, 8.3

1. a) What is meant by the term coefficient in relation to a chemical equation?

b) How does the presence of a coefficient affect the number of atoms of each type in the formula that it precedes?

2. Balance the following equations:

a) H2 + Cl2 ---> HCl

b) Al + Fe2O3 ---> Al2O3 + Fe

c) Pb(CH3COO)2 + H2S ---> PbS + CH3COOH

3. The following equations are incorrect in some way. Identify and correct each error and then balance each equation:

a) Li + O2 ---> LiO2

b) H2 + Cl2 ---> H2Cl2

c) MgCO3 ---> MgO2 + CO2

d) NaI + Cl2 ---> NaCl + I

4. Balance each of the following:

a) Ca(OH)2 + (NH4)2SO4 ---> CaSO4 + NH3 + H2O

b) C2H6 + O2 ---> CO2 + H2O

c) Cu2S + O2 ---> Cu2O + SO2

d) Al + H2SO4 ---> Al2(SO4)3 + H2

e) Pb(NO3)2 + NaOH ---> Pb(OH)2 + NaNO3

f) C12H22O11 + O2 ---> CO2 + H2O

g) Al(OH)3 + H2SO4 ---> Al2(SO4)3 + H2O

5. Translate the following word equations into chemical equations and then balance them:

a) silver nitrate + potassium iodide ---> silver iodide + potassium nitrate

b) nitrogen dioxide + water ---> nitric acid + nitrogen monoxide

c) silicon tetrachloride + water ---> silicon dioxide + hydrochloric acid

Chapter 8, 8.4

1. For the following synthesis reactions, identify the missing reactant(s) or product(s), and then balance the resulting equation:

a) Mg + _______ ---> MgO

b) _______ + O2 ---> Fe2O3

c) Li + Cl2 ---> _______

d) Ca + _______ ---> CaI2

2. Complete the following synthesis reactions by writing both word and chemical equations for each:

a) sodium + oxygen --->

b) magnesium + fluorine --->

c) potassium + chlorine --->

d) hydrogen + iodine --->

e) magnesium + oxygen --->

Chapter 8, 8.5

1. Complete each of the following decomposition reactions and then balance each:

a) HgO + heat --->

b) H2O + D.C. --->

c) Ag2O + heat --->

d) CuCl2 + electricity --->

2. Given the following products of decomposition reactions, determine what the reactant is and then write the chemical equation and balance it:

a) magnesium oxide and water

b) lead (II) oxide and water

c) lithium chloride and oxygen

d) barium chloride and oxygen

e) nickel chloride and oxygen

Chapter 8, 8.6

1. Complete and balance the equations for each of the following single replacement reactions:

a) Zn + Pb(NO3)2 --->

b) Al + Hg(CH3COO)2

c) Al + NiSO4 --->

d) Na + H2O --->

Chapter 8, 8.7

1. Complete and balance the equations for the following double replacement reactions:

a) AgNO3(aq) + NaCl(aq) --->

b) Mg(NO3)2(aq) + KOH(aq) --->

c) LiOH(aq) + Fe(NO3)3(aq) --->

Chapter 8, 8.8

1. List the five types of chemical reactions and give the generalized form for each.

2. Classify each of the following reactions as synthesis, decomposition, single replacement, double replacement, or combustion:

a) N2 + 3H2 ---> 2NH3

b) 2Li + 2 H2O ---> 2LiOH + H2

c) 2NaNO3 ---> 2NaNO2 + O2

d) 2C6H14 + 19O2 ---> 12CO2 + 14H2O

e) NH4Cl ---> NH3 + HCl

f) BaO + H2O ---> Ba(OH)2

g) AgNO3 + NaCl ---> AgCl + NaNO3

3. Complete and balance the equations for the following combustion reactions:

a) CH4 + O2 --->

b) C3H6 + O2 --->

c) C5H12 + O2 --->

4. For each of the following, write the correct chemical equation and then balance the equation:

a) hydrogen + iodine ---> hydrogen iodide

b) lithium + hydrochloric acid ---> lithium chloride + hydrogen

c) sodium carbonate --> sodium oxide + carbon dioxide

d) mercury(II) oxide ---> mercury + oxygen

e) magnesium hydroxide ---> magnesium oxide + water

5. In each of the following combustion reactions, identify the missing reactant(s), product(s) or both, and then balance the resulting equation:

a) C3H8 + ______ ---> ______ + H2O

b) ______ + 8 O2 ---> 5 CO2 + 6 H2O

c) C2H5OH + ______ ---> ______ + ______

Chapter 8. 8.9

1. How is the activity series useful in predicting chemical behavior?

2. Based on the activity series, predict whether each of the following possible reactions listed will occur:

a) Ni + H2O --->

b) Br2 + KI --->

c) Au + HCl --->

d) Cd + HCl --->

e) Mg + Co(NO3)2 --->

3. For each of the reactions in question 2 above, write the correct chemical formulae for each of the product(s) and balance the equations.

4. a) What is meant by the activity of an element?
b) How does this description differ for metals and nonmetals?

5. a) What is an activity series of elements?
b) What is the basis for the reordering of the elements in the activity series?

6. a) What is the chemical principle upon which the activity series of metals is based?
b) What is the significance of the distance between two metals in the activity series?

7. Based on the activity series of metals and halogens, which element within each pair is more likely to replace the other in a compound?

a) K and Na
b) Al and Ni
c) Bi and Cr
d) Cl and F
e) Au and Ag
f) Cl and I
g) Fe and Sr
h) I and F

8. Use the activity series to predict whether each of the following synthesis reactions will occur; if no reaction will occur write no reaction; if a reaction will occur write the correct product(s) and balance the equation:

a) Ca + O2 --->

b) Ni + O2 --->

c) Au + O2 --->

9. Use the activity series to predict which metal, Sn, Mn, or Pt, would be the best choice as a container for an acid.