chem quiz 7
An aqueous solution of sodium carbonate is allowed to react with an aqueous solution of magnesium chloride. What is the coefficient of the solid in the balanced equation (in standard form)? 1 2 3 4 5
1
An aqueous solution of sodium sulfate is allowed to react with an aqueous solution of barium nitrate. What is the coefficient of the solid in the balanced equation (in standard form)? 1 2 3 4 6
1
When the following equation is balanced in standard form, what is the coefficient in front of the H2O? C8H18(g) + O2(g) CO2(g) + H2O(g) 18 8 16 1 25
18
How many electrons are transferred in the following oxidation-reduction reaction? Zn(s) + 2AgNO3(aq) → Zn(NO3)2(aq) + 2Ag(s) 1 2 3 4 5
2
How many of the following are oxidation-reduction reactions? I. reaction of a metal with a nonmetal II. synthesis III. combustion IV. precipitation V. decomposition
4
When the following equation is balanced, what is the coefficient for H2O? Ca(OH)2(aq) + H3PO4(aq) → Ca3(PO4)2(s) + H2O(l) 2 3 4 6 8
6
Which of the following ionic compounds is soluble in water? (NH4)2CO3 MgCO3 CaCO3 Al2(CO3)3 Cu2CO3
(NH4)2CO3
Which of the following is NOT a strong acid or strong base? sulfuric acid hydrochloric acid phosphoric acid sodium hydroxide
phosphoric
An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate. The molecular equation contains which one of the following terms (when balanced in standard form)? KCl(s) KNO3(aq) KNa(aq) ClNO3(aq) NaCl(s)
KNO3-
A substance that, when dissolved in water, produces a solution that conducts electric current very efficiently is called a strong electrolyte a weak electrolyte a strong ion an electrical solute none of these
a strong electrolyte
Classify the following reaction: 2Mg(s) + O2(g) → 2MgO(s) oxidation-reduction combustion synthesis two of the above a-c are all correct.
a-c are all correct
An aqueous solution of ammonium carbonate is allowed to react with an aqueous solution of magnesium chloride. The net ionic equation contains which of the following species (when balanced in standard form)? -CO32-(aq) - 2NH4+(aq) -2Mg2+(aq) -Cl-(aq) -2Cl-(aq)
CO32-
Which of the following ionic compounds is insoluble in water? Na2SO4 CuSO4 Fe2(SO4)3 FeSO4 CaSO4
CaSO4
Which of the following ionic compounds is soluble in water? Na2S MgS CaS Al2S3 Cu2S
Na2S
Which of the following is a strong acid? hydrochloric acid acetic acid phosphoric acid hydrofluoric acid lactic acid
hydrochloric acid
Which of the following is NOT a strong acid or strong base? sulfuric acid hydrochloric acid magnesium hydroxide sodium hydroxide potassium hydroxide
magnesium hydroxide
Which of the following ionic compounds is soluble in water? (NH4)3PO4 Mg3(PO4)2 Ca3(PO4)2 AlPO4 Cu3PO4
(NH4)3PO4
The scientist who discovered the essential nature of acids through solution conductivity studies is Priestley Boyle Einstein Mendeleev Arrhenius
Arrhenius
Which of the following will be spectator ions in the reaction in aqueous solution of barium nitrate and potassium phosphate? Ba2+ and NO3- K+ and NO3- Ba2+, K+, PO43-, and NO3- Ba2+ and PO43- K+ and PO43-
K+&NO3-
Which of the following ionic compounds is soluble in water? K2CO3 MgCO3 CaCO3 Al2(CO3)3 Cu2CO3
K2CO3
Which of the following ionic compounds is insoluble in water? -NaCl - CaCl2 -FeCl3 -BaCl2 - PbCl2
PbCl2
In what type of reaction is water always a product? precipitation acid-base oxidation decomposition synthesis
acid base
The reaction HNO3(aq) + KOH(aq) H2O(l) + KNO3(aq) is a(n) ________ reaction. acid-base precipitation oxidation-reduction single replacement none of these
acid base
When a precipitation reaction occurs, the ions that do not form the precipitate evaporate are cations only form a second insoluble compound in the solution are left dissolved in the solution none of these
are left dissolved in the solution
The equation 2Al(s) + 3Br2(l) → 2AlBr3(s) is a(n) ______________ reaction. -oxidation-reduction and synthesis -oxidation-reduction only -synthesis only - decomposition - combustion
oxidation-reduction and synthesis
An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate. Identify the solid in the balanced equation. KCl NaNO3 KNO3 NaCl There is no solid formed when the two solutions are mixed.
there is no solid formed when the 2 solutions are mixed
The equation 2Ag2O(s) → 4Ag(s) + O2(g) is a(n) ______________ reaction. oxidation-reduction synthesis decomposition combustion two of these
two of these
An aqueous solution of sodium sulfate is allowed to react with an aqueous solution of lead(II) nitrate. The complete ionic equation contains which of the following species (when balanced in standard form)?. 2Na+(aq) 2SO42-(aq) 3Pb2+(aq) NO3-(aq) K+(aq)
2na+
CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) oxidation-reduction synthesis decomposition combustion two of these
two of these
An aqueous solution of sodium sulfide is allowed to react with an aqueous solution of magnesium chloride. The complete ionic equation contains which of the following species (when balanced in standard form)? 2Na+(aq) Na+(aq) 3Mg2+(aq) 2S2-(aq) Cl-(aq)
2Na+
The equation 2C2H6 + 7O2 → 4CO2 + 6H2O is an oxidation-reduction reaction. True or false, and why? True; the carbon is oxidized, and the oxygen is reduced. True; the carbon is reduced, and the oxygen is oxidized. True; the carbon is oxidized, and the hydrogen is reduced. True; the oxygen is reduced, and the hydrogen is oxidized. False
True; the carbon is oxidized, and the oxygen is reduced.
The factors that most commonly cause chemical reactions to occur are all the following except formation of a solid formation of a gas formation of water transfer of electrons a decrease in temperature
a decrease in temperature
Classify the following reaction: HNO3(aq) + KOH(aq) → KNO3(aq) +H2O(l) oxidation-reduction combustion precipitation acid-base two of the above
acid base
In what type of reaction is water always a product? precipitation acid-base oxidation decomposition synthesis
acid base
The reaction 2K(s) + Br2(l) → 2KBr(s) is a(n) ______________ reaction. precipitation acid-base oxidation-reduction double-displacement single-replacement
oxidation reduction
A reaction that involves a transfer of electrons is called a(n) ______________ reaction. precipitation acid-base oxidation-reduction double-displacement none of these
oxidation-reduction
The reaction AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq) is a(n) ______________ reaction. precipitation acid-base oxidation-reduction single-replacement none of these
precipitation
Which of the following statements is not true? When a metal reacts with a nonmetal, an ionic compound is formed. A metal-nonmetal reaction can always be assumed to be an oxidation-reduction reaction. Two nonmetals can undergo an oxidation-reduction reaction. When two nonmetals react, the compound formed is ionic. A metal-nonmetal reaction involves electron transfer.
when 2 nonmetals react, the compound formed is ionic
Which of the following will not be spectator ions in the reaction in aqueous solution of barium nitrate and potassium phosphate? Ba2+ and NO3- K+ and NO3- All will be spectator ion Ba2+ and PO43- K+ and PO43-
Ba2+ & PO43-
An aqueous solution of ammonium carbonate is allowed to react with an aqueous solution of barium chloride. Identify the solid in the balanced equation. BaCO3 NH4Cl BaCl2 (NH4)2CO3 There is no solid formed when the two solutions are mixed.
BaCO3
Which of the following ionic compounds is insoluble in water? Na2SO4 CuSO4 Fe2(SO4)3 FeSO4 BaSO4
BaSO4
An aqueous solution of ammonium sulfate is allowed to react with an aqueous solution of calcium nitrate. The net ionic equation contains which of the following species (when balanced in standard form)?. Ca2+(aq) 2SO42-(aq) 2NH4+(aq) NO3-(aq) 2NO3-(aq)
Ca2+
An aqueous solution of potassium sulfate is allowed to react with an aqueous solution of calcium nitrate. Identify the solid in the balanced equation. CaSO4 K2SO4 Ca(NO3)2 KNO3 There is no solid formed when the two solutions are mixed.
CaSO4
An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate. The complete ionic equation contains which of the following species (when balanced in standard form)? 2K+ 3NO3- Cl- 2Na+ 2KNO3
Cl-
Which of the following will be spectator ions in the reaction in aqueous solutions of silver nitrate and potassium chloride? Ag+ and Cl- K+ and Cl- Ag+, K+, Cl-, and NO3- Ag+ and NO3- K+ and NO3-
K+ & NO3-
Which of the following ionic compounds is soluble in water? K2S MgS CaS Al2S3 Cu2S
K2S
Given the solubility rules from the book, which of the following metal hydroxides should be soluble in water? LiOH CuOH AgOH Cu(OH)2 TlOH
LiOH
Which of the following will not be spectator ions in the reaction in aqueous solution of lead(II) nitrate and potassium chloride? Pb2+ and Cl- K+ and Cl- Pb2+, K+, Cl-, and NO3- Pb2+ and NO3- K+ and NO3-
Pb2+ & Cl-
Which of the following ionic compounds is insoluble in water? Na2SO4 CuSO4 Fe2(SO4)3 FeSO4 PbSO4
PbSO4