I
M
Multiple Choice Questions
1. Which of the following elements should react most readily
I
B) calcium
C)
sulfur
D) oxygen
E) magnesium
2. The collection of ions, all of whose members do not commonly form
precipitates is
'
A. H%f!Ag,W\Ba^
B. PC/-, OH; S2-, CO/-
D. SO2;Cl-,Br,lE. CrO/-, Cu*\2*, SO23. Which substance will not form a gas upon mixing with an
aqueous acid?
A) NaHCO/s)
B) CaS(s)
C) Ca(s)
D) K2S03(s) —
SO*
4. Which metal will not react with aqueous hydrochloric acid?
A) Fe
B) Al
C) Cu
D) K
E) Nz
67
AQUEOUS REACTIONS AND SOLUTIOhTSTOICHIOMETRY
5. How many milliliters of 0.40 M FeBr3 solution would be necessary to
precipitate all of the Ag+from 30 ml of a 0.40 M AgNO3 solution?
to
3o
_ FeBr3(aq) + 3AgNOJ(aq)—+- Fe(NO3)3(aq) + 3AgBr(s
10 ml
V
B) 20 ml
C) 30 ml
D) 60 ml
E) 90 mL
6. How many grams of baking soda, sodium hydrogen carbonate, are
required to completely neutralize 1.00 L of of 6.00 M sulfuric acid
that has been spilled on the floor?
A)
(1/6.00)(2/1)(84.0)
B)
(6.00)(84.0)
C)\(6.00)(2/l)/(84.0)
^
D)/(6.00)(2/l)(84.0)
E)
#2 $ty
f
*
6
(6.00)(1/2)(84.0)
7. It takes 37.50 ml of 0.152 M sodium chromate to titrate 25.00 ml of
silver nitrate. What is the molarity of the silver nitrate solution?
A)
(2)(37.50)(0.152)(25.00)
B)
(25.00)/(37.50)(0.152)(2)
C)
(0.152)(25.00)/(37.50)
D) (37.5Q)(0.152)/(25.00)
\(2)(37.50)(0.152)/(25.00)
j — ^ft
8. Which substance will react with water, at room temperature and
pressure, to produce hydrogen?
A) Mg
C) HN3
D) NaOH
E) NH,
5
>^r>,;>;-
9. Wto is ffoe net-ionic equation for the reaction of aqueous solutions of
CaCl2 and Na2CO3?
A) Ca2*(aq) + 2Cl(aq) + 2Na*(aq) + CO^aq) — »• CaCO/s) +
B) Cl-(a?) +
NaCl(s)
C) CaCl2(aq) +
*- CaCO/s) + 2Cl(aq)
D) Ca2+(aq) +
—*~ CaCOs) +
+ COf(aq)
QiCO/s)
10. Magnesium burns in carbon dioxide to produce carbon and magnesium
oxide. What is the ratio of carbon to magnesium oxide in the products?
A) 1:1
B) 2:1
D) 2:3
E) 3:2
Free Response Questions
1. A student accidentally spills a 1.00 L bottle of concentrated 18.0 M
sulfuric acid on the floor of the laboratory. She attempts to neutralize
the spill by pouring a 5.00 kg box baking soda, sodium hydrogen car- -?j
bonate, onto the acid.
a. Write a balanced net ionic equation for the reaction. Assume the
concentrated sulfuric acid is 100% pure and not in aqueous solution.^
b. What is the limiting reactant?
c. How many grams of sodium hydrogen carbonate are required to
neutralize all the acid?
d. How many moles of excess reactant remain after all the limiting
reactant has been consumed?
e. Would a floor consisting of bare concrete require more, less, or the.:
same amount of baking soda to neutralize the spill? Explain.
2. Three unknown add solutions are labeled A, B and C. One is
acid, one is hydrochloric acid, and the other is nitric acid. Each has fl||
concentration of approximately one molar. Using only aqueous reage
0/0.20 M leaddl) nitrate and 0.50 M calcium nitrate write a short,, t
ffi