CHEM 1012 FINAL EXAM PREP QUESTIONS WITH ACCURATE SOLUTIONS.

CHEM 1012 FINAL EXAM PREP QUESTIONS WITH
ACCURATE SOLUTIONS




1) 2AgNO3(aq) + BaCl2(aq) 2AgCl(s) + Ba(NO3)2(aq) is an example of a
A) precipitation reaction
B) neutralization reaction
C) combustion redox reaction
D) single-displacement redox reaction -- Correct Answer ✔✔ precipitation
reaction



2) Oxidation numbers in reaction (LO-E)In the reaction Ni(s) + 2HCl(aq) NiCl2(aq) +
H2(g)
A) the oxidation state of Ni changes from 0 to +2, and Ni is reduced
B) the oxidation state of Ni changes from 0 to -2, and Ni is reduced
C) the oxidation state of Ni changes from 0 to +2, and Ni is oxidized
D) the oxidation state of Ni changes from 0 to -2, and Ni is oxidized --
Correct Answer ✔✔ the oxidation state of Ni changes from 0 to +2, and
Ni is oxidized



3) In the photosynthesis reaction 6CO2 + 6H2O C6H12O6 + 6O2, how many moles
of H2O will be needed to produce 4 moles of O2?
A) 4
B) 12
C) 6
D) 2 -- Correct Answer ✔✔ 4

,4) The reaction of citric acid and sodium bicarbonate, C6H8O7 + 3NaHCO3 3CO2 +
3H2O + C6H5O7Na3, is used to make bath bombs fizz when added to water. If a
bath bomb is made with 2 mol of C6H8O7 and 6 mol of NaHCO3,
A) C6H8O7 and NaHCO3 will be stoichiometrically balanced (neither will be
limiting)
B) C6H8O7 will be the limiting reactant
C) there isn't enough information to determine the limiting reactant
D) NaHCO3 will be the limiting reactant -- Correct Answer ✔✔ C6H8O7
and NaHCO3 will be stoichiometrically balanced (neither will be limiting)



5) To analyze the amount of calcium in drinking water, an excess of oxalic acid is
added to the water causing calcium oxalate to precipitate. The precipitate is then
filtered and weighed. This is an example of
A) titration analysis
B) dimensional analysis
C) non-combustion gravimetric analysis
D) combustion analysis -- Correct Answer ✔✔ non-combustion gravimetric
analysis



6) In the reaction O2(aq) + 4KI(aq) + 2H2SO4(aq) 2I2(aq) + 2H2O(l) + 2K2SO4(aq),
how many moles of KI are required to react completely with 0.676 mol of O2?
A) 2.70 mol
B) 0.676 mol
C) 1.35 mol
D) 0.169 mol -- Correct Answer ✔✔ 2.70 mol



7) If 2.6 g of hydrogen gas and 16.9 g of oxygen gas are reacted to make water, 2H2(g)
+ O2(g) 2H2O(g), how many grams of H2O can be produced and what will be the
limiting reactant?
A) 12 g of H2O, H2 will be limiting
B) 23 g of H2O, H2 will be limiting
C) 23 g of H2O, O2 will be limiting

, D) 19 g of H2O, O2 will be limiting -- Correct Answer ✔✔ 19 g of H2O, O2
will be limiting



8) In the atmospheric reaction Cl(g) + O3(g) ClO(g) + O2(g)
A) ClO(g) and O2(g) are both reactants
B) Cl(g) and O3(g) are both products
C) Cl(g) is the only reactant
D) Cl(g) and O3(g) are both reactants -- Correct Answer ✔✔ Cl(g) and
O3(g) are both reactants



9) In the atmospheric reaction O(g) + O2(g) O3(g)
A) O(g) and O2(g) are both reactants
B) O(g) is the only reactant
C) O3(g) is the only reactant
D) O(g) and O2(g) are both products -- Correct Answer ✔✔ O(g) and O2(g)
are both reactants



10) Use a table of soluble and insoluble ionic compounds to predict the precipitate that
will form in the reaction of Ca(NO3)2(aq) + Na2(SO4)
A) Only Ca(SO4) will precipitate
B) There will be no precipitate
C) Only Na(NO3) will precipitate
D) Both Ca(SO4) and Na(NO3) will precipitate -- Correct Answer ✔✔ Only
Ca(SO4) will precipitate



11) A strong acid
A) dissociates completely to yield hydroxide ions when dissolved in water
B) reacts partially with water to yield a small amount of hydroxide ions when
dissolved in water
C) reacts completely with water to yield hydronium ions when dissolved in
water