Chemistry A, Final Exam: Lesson 11 Quiz
When methane burns it reacts as shown: CH4 (g) + O2 (g) → H2O(g) + CO2 (g) What coefficient is needed in front of oxygen to balance the reaction? 1 3 4 2
2
The chemical equation Mg (s) + N2 (g)→Mg3N2 (s) is not balanced. What will the coefficient on the Mg be when the equation is balanced? 3 4 2 There will be no coefficient
3
When silver nitrate reacts with aluminum chloride a precipitate forms. What is the most likely formula for this precipitate? AgNO3 Al3NO3 AgCI Al
AgCI
Which of the following best describes the reactants of a double-replacement reaction? Oxygen and a compound of carbon and hydrogen Two elements A single compound An aqueous solution of two ionic compounds
An aqueous solution of two ionic compounds
When butane (C4H10) reacts with oxygen, the combustion reaction product of the combustion reaction are CO2 and H2O C and H2 CH4 and H2O O2 and H2O
CO2 and H2O
Why will the reaction between the reactants Cu(aq) and CaCO3(aq) not occur? CaCO3 needs to be in the gaseous state Cu is less reactive than Ca Cu needs to be a solid Ca and less reactive than Cu
Cu is less reactive than Ca
triangle The symbol -------→ indicates A product is formed A catalyst is used The reactants undergo change Heat is supplied to the reaction
Heat is supplied to the reaction
Which compound below is most likely to dissolve in water? CaCO3 KCI Mg(OH)2 K2S
KCI
When lead (II) nitrate solution reacts with sulfuric acid, it forms solid lead (II) sulfate and aqueous nitric acid. Which of the following ions would be shown in the net ionic equation for this reaction? CO3 ^-2 Pb ^+2 H ^+ NO3 ^-
Pb ^+2
In a chemical equation, what does it mean if an (aq) is shown next to a quantity? The substance does not exist in the real world. The equation is not balanced. The substance is a precipitate. The substance is dissolved in water.
The substance is dissolved in water.
Which of the following equations correctly represents aluminum sulfide reacting with water to yield aluminum hydroxide and dihydrogen sulfide? a.) 6H2O + Al2S3 → 2Al(OH)3 + 3H2S b.) Al2S3 + 6H2O → 2AlH3 + 3H2S + 3O2 c.) 10H2O + 4AlS → 4AlH3 + 5O2 + 4 H2S d.) AlS + H2O → AlO + H2S
a
Which of the following is a decomposition reaction? a.) 2HgO → 2Hg + O2 b.) Fe + S → FeS c.) 2K + 2H2O→2KOH + H2 d.) C5H12 + 8O2 → 5CO2 + 6H2O
a
Which of the following represents a correctly balanced net ionic equation? a.) H ^+ + OH ^- → H2O(l) b.) CH4 + 2O2 → CO2 + 2H2O c.) HCl (aq) + NaOH (aq) → H2O (l) + NaCl (aq) d.) Pb ^+2 + 4OH ^- → Pb(OH)2 (s)
a
What is an ion called that appears on both sides of the equation and is not directly involved in the reaction? a spectator ion an active ion an ornamental ion an insoluble ion
a spectator ion
Which of the following is the net ionic equation for Pb(NO3)2 (aq) + 2KI (aq) → PbI2(s) + 2KNO3 (aq)? a.) K+ + I ^- → KI (aq) b.) Pb ^+2 + 2I^- → PbI2 (s) c.) Pb ^+2 + 2NO3 ^- → Pb(NO3)2 (aq) d.) K ^+ + NO ^3- → KNO3
b
Which of the following choices completes the equation started below and expresses the equation in its net ionic form? Remember, silver chloride is a precipitate. AgNO3 (aq) + AlCl3 (aq)→ a.) Al ^+3 + 3NO3- →Al(NO3)3 b.) Al ^+3 + 3Cl^- → AlCl3 c.) Ag ^+ + Cl ^- → AgCl d.) Ag ^+ + NO3 ^- → AgNO3
c
Which of the following represents a balanced equation of Zn(OH)2 + H3PO4 → Zn3(PO4)2 + H2O? a.) 3Zn(OH)2 + 3H3PO4 → 3Zn3(PO4)2 + 2H2O b.) 3Zn(OH)2 + 4H3PO4 → 2Zn3(PO4)2 + 4H2O c.) 3Zn(OH)2 + 2H3PO4 → Zn3(PO4)2 + 6H2O d.) 2Zn(OH)2 + 3H3PO4 → 2Zn3(PO4)2 + 4H2O
c
Which of the following is an example of a balanced single-replacement equation? a.) Fe2(CO3)3 → Fe2O3 + 3CO2 b.) Ag2SO4 + CaCl2→ 2AgCl + CaSO4 c.) Sn + HNO3 → Sn(NO3)4 + 4H2 d.) 3Co(C2H3O2)2 + 2Al → 2Al(C2H3O2)3 + 3Co
d
Which of the following is an example of a single-replacement reaction? a.) C + O2 → CO2 b.) 2Mg + O2 → 2MgO c.) CH4 + 2O2 → CO2 + 2H2O d.) Cu(NO3)2 + Pb → Cu + Pb(NO3)2
d
Pure sodium metal reacting with water is what type of chemical reaction? synthesis combustion single replacement decomposition
single replacement