Review Questions
You have 20 minutes. You may not use a calculator.Reactions and Periodicity 811.___ Fe(OH) 2 (s) + ___ H 3 PO 4 (aq) → ___
Fe 3 (PO 4 ) 2 (s) +___ H 2 O( l)After the above chemical equation is balanced
the lowest whole-number coefficient for water is:(A) 3
(B) 1
(C) 9
(D) 6
(E) 12Choose one of the following for questions 2–4.
(A) Cu^2 +
(B) CO 32 −
(C) Fe^3 +
(D) Al^3 +
(E) Pb^2 +2.This ion will generate gas bubbles when
hydrochloric acid is added.3.This ion initially gives a white precipitate when
dilute sodium hydroxide is added to a solution
containing this ion. The precipitate will dissolve
in excess sodium hydroxide.4.Aqueous solutions of this ion are blue.5.Which of the following best represents the bal-
anced net ionic equation for the reaction of
lead(II) carbonate with concentrated hydrochlo-
ric acid?(A) Pb 2 CO 3 +2 H++Cl−→Pb 2 Cl +CO 2 +H 2 O
(B) PbCO 3 +2 H++2 Cl−→
PbCl 2 +CO 2 +H 2 O
(C) PbCO 3 +2 H+→Pb^2 ++CO 2 +H 2 O
(D) PbCO 3 +2 Cl−→PbCl 2 +CO 32 −
(E) PbCO 3 +2 HCl →PbCl 2 +CO 2 +H 2 O6.A sample of copper metal is reacted with concen-
trated nitric acid in the absence of air. After the
reaction, which of these final products are present?(A) CuNO 3 and H 2 O
(B) Cu(NO 3 ) 3 , NO, and H 2 O
(C) Cu(NO 3 ) 2 , NO, and H 2 O
(D) CuNO 3 , H 2 O, and H 2
(E) Cu(NO 3 ) 2 , NO, and H 27.Which of the following is the correct net ionic
equation for the reaction of acetic acid with
potassium hydroxide?(A) HC 2 H 3 O 2 +OH−→C 2 H 3 O 2 −+H 2 O
(B) HC 2 H 3 O 2 +K+→KC 2 H 3 O 2 +H+
(C) HC 2 H 3 O 2 +KOH →KC 2 H 3 O 2 +H 2 O
(D) H++OH−→H 2 O
(E) C 2 H 3 O 2 −+KOH →KC 2 H 3 O 2 +OH−8.Which of the following is the correct net ionic
equation for the addition of aqueous ammonia
to a precipitate of silver chloride?(A) AgCl +4 NH 3 →[Ag(NH 3 ) 4 ]++Cl−
(B) AgCl +2 NH 4 +→[Ag(NH 4 ) 2 ]^3 ++Cl−
(C) AgCl +NH 4 +→Ag++NH 4 Cl
(D) AgCl +NH 3 →Ag++NH 3 Cl
(E) AgCl +2 NH 3 →[Ag(NH 3 ) 2 ]++Cl−9.Potassium metal will react with water to release
a gas and a potassium compound. Which of the
following is a false statement?(A) The solution is acidic.
(B) The gas is hydrogen.
(C) The potassium compound is water-soluble.
(D) The potassium compound will react with
hydrochloric acid.
(E) A solution of the potassium compound will
form a precipitate when added to an FeCl 2
solution.10.A sample is tested for the presence of the Hg 22 +
ion. This ion, along with others, may be precip-
itated with chloride ion. If Hg 22 +is present in
the chloride precipitate, a black color will form
upon treatment with aqueous ammonia. The
balanced net ionic equation for the formation of
this black color is:(A) Hg 2 Cl 2 +2 NH 3 +2 H 2 O →
2 Hg +2 NH 4 ++2 Cl−+2 OH−
(B) Hg 2 Cl 2 +2 NH 3 →2 Hg +2 NH 3 Cl
(C) Hg 2 Cl 2 +2 NH 4 +→2 Hg +2 NH 4 Cl
(D) Hg 2 Cl 2 +NH 4 +→2 Hg +NH 4 Cl +Cl−
(E) Hg 2 Cl 2 +2 NH 3 →
Hg +HgNH 2 Cl +NH 4 ++Cl−