Chem 212 Lab Final QUESTIONS WITH
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ANSWERS
Consider the following reaction at equilibrium: (Ca2+) +
|\ |\ |\ |\ |\ |\ |\ |\
(2OH-) <--> (Ca(OH)2) with solid (Ca(OH)2) at the bottom
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of the test tube. When a strong base such as NaOH is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
added to the solution it will cause a direct increase in the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
concentration of _______. As a result the reaction will shift
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to the _______, and will cause _______. - CORRECT
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ANSWERS ✔✔-(OH-) |\
-right
-precipitation
Consider the following reaction at equilibrium: (Ca2+) +
|\ |\ |\ |\ |\ |\ |\ |\
(2OH-) <--> (Ca(OH)2) with solid (Ca(OH)2) at the bottom
|\ |\ |\ |\ |\ |\ |\ |\
of the test tube. When a strong acid such as HCl is added
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to the solution it will cause a direct decrease in the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
concentration of _______. As a result the reaction will shift
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to the _______, and will cause _______. - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔-(Ca(OH)2) |\
-left
-dissolving
,Consider the equivalence point of a titration between a
|\ |\ |\ |\ |\ |\ |\ |\ |\
monoprotic weak acid and a strong base. Which of the |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
following statements is always true? |\ |\ |\ |\
a. the pH is a neutral 7.00
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b. the pH is less than 7.00
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c. the pH is more than 7.00
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d. the volume of the base is equal to the volume of the
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acid
e. the moles of the base is equal to the moles of the acid -
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CORRECT ANSWERS ✔✔e. the moles of the base is equal
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to the moles of the acid
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What does "p" stand for in pH, pKa, and pKb? - CORRECT
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ANSWERS ✔✔(-log) |\
True or false: slightly decreasing the volume of Na2S2O3
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in the reactions in labs 3 and 4 would decrease the time
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for the reaction to change color. - CORRECT ANSWERS
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✔✔true
True or false: slightly decreasing the volume of Na2S2O3
|\ |\ |\ |\ |\ |\ |\ |\ |\
in the reactions in labs 3 and 4 would decrease the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reaction rate. - CORRECT ANSWERS ✔✔false
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, What is the formula for Molarity (M)? - CORRECT
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ANSWERS ✔✔M = (moles of solute)/(L of solution) |\ |\ |\ |\ |\ |\ |\
Which of the following statements is false? Consider the
|\ |\ |\ |\ |\ |\ |\ |\ |\
following generic reaction and rate law: aA + bB -> cC |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
rate = k([A]^3)*([B]^1)
|\ |\ |\
a. decreasing the concentrations of A and B will decrease
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the reaction rate.
|\ |\
b. increasing the concentrations of A and B will increase
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the reaction rate.
|\ |\
c. the concentration of B has a greater effect than the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
concentration of A. |\ |\
d. the concentration of A has a greater effect than the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
concentration of B. - CORRECT ANSWERS ✔✔c. the |\ |\ |\ |\ |\ |\ |\ |\
concentration of B has a greater effect than the |\ |\ |\ |\ |\ |\ |\ |\ |\
concentration of A. |\ |\
A student analyzing an aspirin tablet prepared a solution
|\ |\ |\ |\ |\ |\ |\ |\ |\
by dissolving 1 tablet into 500mL solution and labeled it
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Solution A. The student then took 10mL of Solution A and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
diluted it to 100mL and labeled this Solution B. The
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
student then determined the acetylsalicylic acid
|\ |\ |\ |\ |\ |\
concentration of Solution B is 4.66E-4M. |\ |\ |\ |\ |\ |\
1. What is the concentration of Solution A?
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ANSWERS
Consider the following reaction at equilibrium: (Ca2+) +
|\ |\ |\ |\ |\ |\ |\ |\
(2OH-) <--> (Ca(OH)2) with solid (Ca(OH)2) at the bottom
|\ |\ |\ |\ |\ |\ |\ |\
of the test tube. When a strong base such as NaOH is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
added to the solution it will cause a direct increase in the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
concentration of _______. As a result the reaction will shift
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to the _______, and will cause _______. - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔-(OH-) |\
-right
-precipitation
Consider the following reaction at equilibrium: (Ca2+) +
|\ |\ |\ |\ |\ |\ |\ |\
(2OH-) <--> (Ca(OH)2) with solid (Ca(OH)2) at the bottom
|\ |\ |\ |\ |\ |\ |\ |\
of the test tube. When a strong acid such as HCl is added
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to the solution it will cause a direct decrease in the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
concentration of _______. As a result the reaction will shift
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to the _______, and will cause _______. - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔-(Ca(OH)2) |\
-left
-dissolving
,Consider the equivalence point of a titration between a
|\ |\ |\ |\ |\ |\ |\ |\ |\
monoprotic weak acid and a strong base. Which of the |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
following statements is always true? |\ |\ |\ |\
a. the pH is a neutral 7.00
|\ |\ |\ |\ |\ |\
b. the pH is less than 7.00
|\ |\ |\ |\ |\ |\
c. the pH is more than 7.00
|\ |\ |\ |\ |\ |\
d. the volume of the base is equal to the volume of the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
acid
e. the moles of the base is equal to the moles of the acid -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔e. the moles of the base is equal
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to the moles of the acid
|\ |\ |\ |\ |\
What does "p" stand for in pH, pKa, and pKb? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔(-log) |\
True or false: slightly decreasing the volume of Na2S2O3
|\ |\ |\ |\ |\ |\ |\ |\ |\
in the reactions in labs 3 and 4 would decrease the time
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
for the reaction to change color. - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔true
True or false: slightly decreasing the volume of Na2S2O3
|\ |\ |\ |\ |\ |\ |\ |\ |\
in the reactions in labs 3 and 4 would decrease the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reaction rate. - CORRECT ANSWERS ✔✔false
|\ |\ |\ |\ |\
, What is the formula for Molarity (M)? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔M = (moles of solute)/(L of solution) |\ |\ |\ |\ |\ |\ |\
Which of the following statements is false? Consider the
|\ |\ |\ |\ |\ |\ |\ |\ |\
following generic reaction and rate law: aA + bB -> cC |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
rate = k([A]^3)*([B]^1)
|\ |\ |\
a. decreasing the concentrations of A and B will decrease
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the reaction rate.
|\ |\
b. increasing the concentrations of A and B will increase
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the reaction rate.
|\ |\
c. the concentration of B has a greater effect than the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
concentration of A. |\ |\
d. the concentration of A has a greater effect than the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
concentration of B. - CORRECT ANSWERS ✔✔c. the |\ |\ |\ |\ |\ |\ |\ |\
concentration of B has a greater effect than the |\ |\ |\ |\ |\ |\ |\ |\ |\
concentration of A. |\ |\
A student analyzing an aspirin tablet prepared a solution
|\ |\ |\ |\ |\ |\ |\ |\ |\
by dissolving 1 tablet into 500mL solution and labeled it
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Solution A. The student then took 10mL of Solution A and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
diluted it to 100mL and labeled this Solution B. The
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
student then determined the acetylsalicylic acid
|\ |\ |\ |\ |\ |\
concentration of Solution B is 4.66E-4M. |\ |\ |\ |\ |\ |\
1. What is the concentration of Solution A?
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