Exercises for Chapter 10 PSC1515
1. Provide the empirical formulas for:
a. C5H10O5 ________________
b. N2O4__________________
c. P2O5___________________
2. What is the formula weight and molar mass for:
a. Al(NO3)3_____________ _____________
b. (NH4)2CO3_________________ _____________
c. Br2__________________ ______________
3. Balance the following equations:
a. ___C7H14 + ___O2
___ CO2 +___H2O
b. ___Co(OH)3 + ___Na2SO4
___Co2(SO4)3 + ____NaOH
c. ___Ba + ___H2O
Ba(OH)2 + H2
d. ___N2O + O2
___ N2Ol5
4. Identify the above reactions by type:
a. ___________________
b.____________________
c.____________________
d.____________________
5. Identify the following reactions by type:
a. Sr(OH)2 + H 2SO4
SrSO4 + 2H2O____________
b. H2CO3
H2O + CO2________________
c. Rb + AgNO3
RbNO3 + Ag_______________
d. 3H2 + Cu3(PO4)2
2H3PO4 + 3Cu ______________
e. (NH4)2S + Al(NO3)3
NH4NO3 + Al2S3_______________
6. In order for single replacement reactions to occur, what has to be true?
7. In order for double replacement reactions to occur, what has to be true?
8. What two types of reactions always produce water?
a.__________________
b.__________________
9. How much NiBrl2 is produced in the following reaction if 117 g of Ni react
with 734 g of PbBr2 and 414 g of Pb are produced?
Ni + PbBr2
NiBr2 + Pb
10. The coefficients in a balanced equations represent ratios of
_____________ and _________________.
11. How many moles are there in 67.3 g of oxygen?
12. How many grams of NaCl are there in 2.7 moles of NaCl?
Answers:
1. CH2O, NO2, P2O5
2. 213.01 amu, 213.01 g/mol, 96.11 amu, 96.11 g/mol, 159.80 amu, 159.80 g/mol
3. 2,21,14,14
2,3,1,6
1,2,1,2
1,2,1
4. Combustion, Double Replacement, Single Replacement, Combination
5. Neutralization, Decomposition, Single Replacement, Single Replacement, Double
Replacement.
6. The metal (or hydrogen) by itself must be reactive than the metal (or hydrogen) in the
compound.
7. At least one product must be a solid (insoluble in water, precipitate), liquid, or gas.
8. Neutralization and Combustion
9. 437 g 10. particles (atoms, molecules or formula units), or moles.
11. 2.10 moles of O2
12. 158 g NaCl