Quantitative Review Worksheet

Answers at back
Quantitative Chemistry Review Worksheet
1.
You should be able to classify reactions type, balance reaction equations, and write simple
equations including states. Example questions below:
type:
____
___C4H10(g) + ___ O2(g)  ___ CO2(g) + ___ H2O(g)
____
___ AgNO3(aq) + ___ CuSO4(aq)  ___ Ag2SO4(s) + ___ Cu(NO3)2(aq)
____
___ Cl2(g) + ___ Na2S(aq)  ___ NaCl(aq) + ___ S8(s)
____
___ Ag(s) + ___ O2(g) + ___ H2(g) ___ AgOH(s)
Lead (II) nitrate solution and potassium iodide solution react to produce a precipitate (and
another product). Write (including states), balance, and state reaction type.
____
2.
Write non-ionic, total ionic and net ionic equations for the reaction of barium chlorate
solution with sodium phosphate solution.



3.
A colourless solution has a red flame. It doesn’t form a precipitate with the addition of
NaOH(aq), but a fresh sample does form a precipitate with the addition of Na2SO4(aq).
What ion must be present in this solution? (Use the solubility table given at the end of the
worksheet. This question won’t work with the one in your Data Booklet.)
4.
Gasoline {actually a mixture of compounds, but assume for the purposes of this question
that it is pure C8H18(l)} underwent complete combustion in an experimental engine.
What mass of CO2(g) would be produced during the combustion of 250 g of “gasoline”?
Quantitative Chemistry Review Worksheet
5.
page 2
Nitric acid, HNO3(aq), can be neutralized by reacting it with aqueous strontium hydroxide,
Sr(OH)2(aq). The unbalanced reaction equation is:
____ Sr(OH)2(aq) + ____ HNO3(aq)  ____ Sr(NO3)2(aq) + ____ H2O(l)
What volume of 0.676 mol/L HNO3(aq) can be neutralized by 22.7 mL of 0.385 mol/L
Sr(OH)2(aq)?
6.
Label the following diagram:
solid that stays behind on filter paper a)
a)
b)
solution that goes through filter paper b)
c)
type of flask used c)
7.
In Investigation 7.B.1 you prepared 50 mL of CuSO4(aq) in a 100 mL beaker and poured it
into 50 mL of Sr(NO3)2(aq) prepared in a 250 mL beaker. Why did you do it this way rather
than in the reverse direction? The lab handout is on my website if you’ve lost yours.
8.
In the unbalanced reaction equation given below, 50.0 g of silver is reacted with 30.0 g of
sulfur and more than enough oxygen.
____Ag(s) + ____S8(s) + ____O2(g) → ____Ag2SO4(s)
a) Which is the limiting reagent, Ag(s) or S8(s)?
Quantitative Chemistry Review Worksheet
page 3
b) What is the expected mass of product, Ag2SO4(s)
9.
List 5 factors that can limit or reduce the experimental yield of a product in a chemical
reaction when compared to the predicted yield obtained using stoichiometry.
10. Xenon can be made to react with fluorine gas at about 400oC. The product that forms is
xenon tetrafluoride(g). This reaction was first performed in the mid 1960’s illustrating that
under the right conditions some noble gases could be forced to react..
a) Write the balanced reaction equation.
b) How many grams of xenon tetrafluoride will form if 2.85 g of fluorine react with excess
Xe(g)?
c) If the experimental yield was 6.31 g, what was the % yield of the reaction?
Quantitative Chemistry Review Worksheet
11. Label the following diagram and answer the
associated questions.
page 4
name of device a)
a)
b)
name of solution b)
name of device part d)
c)
d)
name of solution c)

If I do the “titration of NaOH(aq) with HCl(aq)”, which solution is NaOH, a) or c)?

If I do a titration to find the concentration of solution b), what special name is given to
this type of titration?

The point in the titration where equivalent moles of acid and base are present is called?

The colour change of an indicator during a titration is called?
12. Use the following titration data to find the concentration of HCl(aq):
titration of 10.00 mL of HCl with 0.125 mol/L Sr(OH)2(aq)
Trial
1
2
3
4
final Buret Reading (mL)
10.54
20.26
29.90
39.70
initial Buret Reading (mL)
0.24
10.54
20.26
29.90
titration volume (mL)
it looks like there’s not enough
information, but there is
Quantitative Chemistry Review Worksheet
page 5
13. Sketch titration (pH) curves for
a) titration of a monoprotic strong acid with a monoprotic strong base
b) titration of a monoprotic strong base with a monoprotic strong acid
Ion →
CO32ˉ, IO3ˉ,
Fˉ
Solubility most
≥ 0.1
mol/L
(very
soluble)
most
most
most
Solubility
≤ 0.1
mol/L
(slightly
soluble)
Li+,
Mg2+,
Ca2+,
Sr2+,
Ba2+,
Fe2+,
Hg22+,
Pb2+
Cu+,
Ag+,
Hg22+,
Hg2+,
Pb2+
Ca2+, most
Sr2+,
Ba2+,
Hg22+,
Pb2+,
Ag+
RbClO4,
CsClO4,
AgCH3COO,
Hg2(CH3COO)2
Clˉ,
SO42ˉ
H+, Na+, K+,
NH4+, NO3ˉ,
ClO3ˉ, ClO4ˉ,
Solubility
CH3COOˉ
↓
Iˉ,
PO43ˉ, OOCCOO2ˉ
Brˉ
SO32ˉ
H+,
Na+,
K+,
NH4+
S2ˉ
OHˉ
Li+,
Li+,
Li+,
Co(IO3)2,
Mg2+, Sr2+
Fe2(OOCCOO)3 Ca2+
most
most
most
Quantitative Chemistry Review Worksheet
page 6
Answers
1. _C__
_2_C4H10(g) + _13_ O2(g)  _8_ CO2(g) + _10_ H2O(g)
_DR_
_2_ AgNO3(aq) + _1_ CuSO4(aq)  _1_ Ag2SO4(s) + _1_ Cu(NO3)2(aq)
_SR_
_8_ Cl2(g) + _8_ Na2S(aq)  _16_ NaCl(aq) + _1_ S8(s)
_F__
_2_ Ag(s) + _1_ O2(g) + _1_ H2(g) _2_ AgOH(s)
Lead (II) nitrate solution and potassium iodide solution react to produce a precipitate (and
another product). Write (including states), balance, and state reaction type.
_DR_
Pb(NO3)2(aq) + 2 KI(aq)  PbI2(s) + 2 KNO3(aq)
2. 3 Ba(ClO3)2 + 2 Na3PO4(aq)  1 Ba3(PO4)2(s) + 6 NaClO3(aq)
3 Ba2+(aq) + 6 ClO3ˉ(aq) + 6 Na+(aq) + 2 PO43ˉ(aq)  Ba3(PO4)2(s) + 6 Na+(aq) + 6 ClO3ˉ(aq)
3 Ba2+(aq) + 2 PO43ˉ(aq)  Ba3(PO4)2(s)
3. See attached Solubility Chart.
4. 2 C8H18(l) + 25 O2(g)  16 CO2(g) + 18 H2O(g)
n1
250 g
n1  250 g 
n2
m=?
1 mol
 2.19 mol
114.26 g
16
 2.19 mol  17.5 mol
2
m  17.5 mol  44.01g mol  770 g
n2 
5. 1 Sr(OH)2(aq) + 2 HNO3(aq)  1 Sr(NO3)2(aq) + 2 H2O(l)
n1
0.385 mol/L
22.7 mL
n2
0.676 mol/L
v=?
n1  0.385 mol L  0.0227L  8.74  10 3 mol
2
 8.74  10 3 mol  0.0175 mol
1
1
L
v  0.0175 mol 
 0.0259 L  25.9 mL
0.676 mol
n2 
Quantitative Chemistry Review Worksheet
6. a)
b)
c)
page 7
precipitate
filtrate
erlenmeyer flask
7. The CuSO4 in solution was the excess reagent. It could be poured into the Sr(NO3)2 without
any need of rinsing to make sure that all of it went into the reaction.
8. 16 Ag(s) + 1 S8(s) + 16 O2(g) → 8 Ag2SO4(s)
n1
n2
n3
50 g
30 g
n1  50 g 
n3 
1 mol
 0.464 mol
107.87 g
8
 0.464 mol  0.232 mol
16
find which one makes least moles,
n3, of product
n2  30 g 
n3 
1 mol
 0.117 mol
256.56 g
8
 0.117 mol  0.935 mol
1
Ag is limiting since it makes fewer moles of product
b)
m  0.232 mol  311.81g mol  72.3 g of Ag2SO4(s)
9. list given on page 306 of text
10. a) Xe(g) + 2 F2(g) XeF4(g)
b) Xe(g) + 2 F2(g) XeF4(g)
n1
2.85 g
n2
m=?
2.85 g
 0.0750 mol
38.00 g mol
1
n2   0.0750 mol  0.0375 mol
2
m  0.0375 mol  207.29 g mol  7.77 g
n1 
c)
6.31g
 100%  81.2%
7.77 g
11. p. 312 and notes
Quantitative Chemistry Review Worksheet
12.
Average titration volume:
10.30 mL (omit, out of range)
9.72 mL  9.64 mL  9.80 mL
 9.72 mL
3
2 HCl(aq) + 1 Sr(OH)2(aq)  1 SrCl2(aq) + 2 HOH(l)
n2
c=?
10.00 mL
n1
0.125 mol/L
9.72 mL
n1  0.125 mol L  0.00972 L  0.00122 mol
2
 0.00122 mol  0.00243 mol
1
1
1
 0.243 mol L
HCl   0.00243 mol 
0.01000 L
n2 
13. p. 318
page 8