Chapter 4 Test

24 July 2022
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question
Which of the following compounds is a strong electrolyte
answer
NaF
question
Which of the following compounds is a weak electrolyte?
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HNO₂
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Which of the following compounds is a strong electrolyte?
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KOH
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Which of the following compounds is a weak electrolyte?
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CH3COOH (acetic acid)
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Which of the following compounds is a weak electrolyte?
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NH3
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Which of the following compounds is a nonelectrolyte?
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C6H12O6
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Which of the following compounds is a nonelectrolyte?
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C2H6O
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Identify the major ionic species present in an aqueous solution of Na2CO3.
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Na+, CO32-
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Identify the major ionic species present in an aqueous solution of K2SO4.
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2K+, SO42-
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Identify the major ionic species present in an aqueous solution of NH4ClO4
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NH4+, ClO4-
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Identify the major ionic species present in an aqueous solution of C6H12O6 (glucose).
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No ions are present
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Identify the major ionic species present in an aqueous solution of FeCl3.
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Fe3+, 3 Cl-
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Identify the major ionic species present in an aqueous solution of C12H22O11 (sucrose).
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No ions are present
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The distinguishing characteristic of all electrolyte solutions is that they
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conduct electricity
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Based on the solubility rules, which one of the following compounds should be insoluble in water?
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AgBr
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Based on the solubility rules, which of the following compounds should be insoluble in water?
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BaSO4
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Based on the solubility rules, which of the following compounds should be insoluble in water?
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CaCO3
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Based on the solubility rules, which of the following should be soluble in water?
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Na2S
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Based on the solubility rules, which of the following should be soluble in water?
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AgNO3
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Based on the solubility rules, which of the following should be soluble in water?
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(NH4)3PO4
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Based on the solubility rules, which of the following should be soluble in water?
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K2SO4
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Which of the following will occur when a solution of Pb(NO3)2(aq) is mixed with a solution of KI(aq)?
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A precipitate of PbI2 will form; K+ and NO3- are spectator ions.
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Which of the following will occur when solutions of CuSO4(aq) and BaCl2(aq) are mixed?
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A precipitate of BaSO4 will form; Cu2+ and Cl- are spectator ions.
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Which of the following will occur when solutions of ZnSO4(aq) and MgCl2(aq) are mixed?
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No precipitate will form.
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Identify the precipitate(s) formed when solutions of Na2SO4(aq), Ba(NO3)2(aq), and NH4ClO4(aq) are mixed.
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BaSO4
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Identify the precipitate(s) formed when solutions of NH4Cl(aq), AgClO3(aq), and NaCl(aq) are mixed.
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AgCl
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Identify the precipitate(s) formed when solutions of Ca(ClO4)2(aq), K2CO3(aq), and NaNO3(aq) are mixed.
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CaCO3
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Identify the precipitate(s) formed when solutions of Pb(NO3)2(aq), Mg(ClO4)2(aq), and (NH4)2SO4(aq) are mixed.
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PbSO4
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Identify the correct net ionic equation for the reaction that occurs when solutions of Pb(NO3)2 and NH4Cl are mixed.
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Pb2+(aq) + 2Cl-(aq) PbCl2(s)
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Identify the correct net ionic equation for the reaction that occurs when solutions of AgNO3 and NH4Cl are mixed.
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Ag+(aq) + Cl-(aq) AgCl(s)
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Identify the correct net ionic equation for the reaction that occurs when solutions of Ba(ClO4)2 and K2SO4 are mixed.
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Ba2+(aq) + SO42-(aq) BaSO4(s)
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Identify the correct net ionic equation for the reaction that occurs when solutions of Na3PO4 and Ca(NO3)2 are mixed.
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3Ca2+(aq) + 2PO43-(aq) Ca3(PO4)2(s)
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The common constituent in all acid solutions is
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H+
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Which of the following compounds is a weak acid?
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HF
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Which of the following compounds is a strong acid?
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HI
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Which of the following compounds is a weak base?
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NH3
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Which of the following ions is a weak acid?
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HSO4
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Identify the major ions present in an aqueous LiOH solution.
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Li+, OH-
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Identify the major ions present in an aqueous HNO3 solution.
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H+, NO3-
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Identify the major ionic species present in an aqueous solution of H2SO4.
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H+, HSO4-
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Identify the correct net ionic equation for the reaction that occurs when solutions of HNO3 and KOH are mixed?
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H+(aq) + OH-(aq) H2O(l)
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Identify the correct net ionic equation for the reaction that occurs when solutions of HClO4 and Ba(OH)2 are mixed.
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H+(aq) + OH-(aq) H2O(l)
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Identify the correct net ionic equation for the reaction that occurs when solutions of HF and KOH are mixed
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HF(aq) + OH-(aq) H2O(l) + F-(aq)
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The oxidation number of N in NaNO3 is
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+5
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The oxidation number of S in K2SO4 is
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+6
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The oxidation number of Mn in KMnO4 is
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+7
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The oxidation number of Fe in K3Fe(CN)6 is
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+3
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The oxidation number of Cr in Cr2O72- is
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+6
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For the chlorate ion, ClO3- , what are the oxidation states of the Cl and O, respectively?
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+5, - 2
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For the perchlorate ion ClO4- , what are the oxidation states of the Cl and O, respectively?
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+7, - 2
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The highest possible oxidation number of nitrogen is
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+5
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For which one of the following acids is chlorine in the +5 oxidation state?
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HClO3
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The highest possible oxidation number of carbon is
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+4
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Select the compound in which sulfur has its highest possible oxidation number.
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Na2SO4
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The oxidation number of N in N2H4 is
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-2
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Determine the correct oxidation numbers for all three elements in Rb2SO3 in the order that the elements are shown in the formula.
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+1, +4, -2
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Determine the correct oxidation numbers for all three elements in Ca(ClO)2 in the order that the elements are shown in the formula?
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+2, +1, -2
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Using the redox reaction below determine which element is oxidized and which is reduced. 4NH3 + 3Ca(ClO)2 2N2 + 6H2O + 3CaCl2
answer
N is oxidized and Cl is reduced
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How many total electrons are transferred in the following reaction? B2H6(g) + 3O2(g) B2O3(s) + 3H2O(l)
answer
12
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How many total electrons are transferred in the following reaction? 4 P(s) + 5O2(g) 2P2O5(s)
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20
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How many total electrons are transferred in the following reaction? 2Na(s) + Cl2(g) 2NaCl(s)
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2
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Which one of the following is a redox reaction?
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2Al(s) + 3H2SO4(aq) Al2(SO4)3(aq) + 3H2(g)
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Which of the following equations does not represent an oxidation-reduction reaction?
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2NaCl + Pb(NO3)2 PbCl2 + 3NaNO3
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In the following chemical reaction the oxidizing agent is 5H2O2 + 2MnO4- + 6H+ 2Mn2+ + 8H2O + 5O2
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MnO4-
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In the following chemical reaction the oxidizing agent is 5S + 6KNO3 + 2CaCO3 3K2SO4 + 2CaSO4 + CO2 + 3N2
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KNO3
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Identify the oxidizing agent in the following chemical reaction. 2MnO4- + 5H2SO3 2Mn2+ + 5SO42- + 4H+ + 3H2O
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MnO4
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Identify the reducing agent in the following chemical reaction. 5Fe2+(aq) + MnO4-(aq)+ 8H+(aq) 5Fe3+(aq) + Mn2+(aq) + 4H2O(l)
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Fe2+
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Identify the reducing agent in the following chemical reaction. Cd + NiO2 + 2H2O Cd(OH)2 + Ni(OH)2
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Cd
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What element is oxidized in the following chemical reaction? 3Cu + 8HNO3 3Cu(NO3)2 + 2NO + 4H2O
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Cu
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What element is oxidized in the following chemical reaction? NiO2 + Cd + 2H2O Ni(OH)2 + Cd(OH)2
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Cd
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What element is oxidized in the following chemical reaction? H2SO4 + Cd(OH)2 2H2O + CdSO4
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Not redox reaction
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What element is reduced in the following chemical reaction? Cu + 2H2SO4 CuSO4 + SO2 + 2H2O
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S
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Identify the elements that are oxidized and reduced in the following reaction. KClO3(aq) + 6HBr(aq) KCl(aq) + 3Br2(l) + 3H2O(l)
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Br is oxidized and Cl is reduced
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Predict the products of the following single replacement reaction. Fe(s) + CuSO4(aq)
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Cu(s) + FeSO4(aq)
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Predict the products of the following single replacement reaction. Zn(s) + CoCl2(aq)
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Co(s) + ZnCl2(aq
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Predict the products of the following single replacement reaction. Ni(s) + Cu(NO3)2(aq)
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Ni(NO3)2(aq) + Cu(s)
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Example of a disproportionation reaction
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2H2O2(aq) 2H2O(l) + O2(g)
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NOT a redox reaction?
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NH4Cl(aq) + AgNO3 NH4NO3(aq) + AgCl(s)
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Which of the following is NOT a redox reaction?
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2LiOH(aq) + H2SO4(aq) Li2SO4(aq) + 2H2O(l)
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Which of the following represents a precipitation reaction?
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CaBr2(aq) + H2SO4(aq) CaSO4(s) + 2HBr(g)
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Which of the following represents an acid-base neutralization reaction
answer
LiOH(aq) + HNO3(aq) LiNO3(aq) + H2O(l)
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Which of the following represents a hydrogen displacement reaction?
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2Al(s) + 3H2SO4(aq) Al2(SO4)3(aq) + 3H2(g)
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Which of the following represents a combustion reaction?
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2C2H6(g) + 7O2(g) 4CO2(g) + 6H2O(l)
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What type of reaction is the following? Ca(OH)2(s) + 2 HNO3(aq) Ca(NO3)2(aq) + 2 H2O(l)
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Acid-base neutralization reaction
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What type of reaction is the following? C2H4(g) + 3 O2(g) 2 CO2(g) + 2 H2O(g)
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Combustion reaction
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The reaction below can be classified as which type of reaction ? 2 NO2(g) + H2O(l) HNO2(aq) + HNO3(aq)
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Disproportionation reaction
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What mass of C12H22O11 (sucrose) is needed to prepare 255 mL of a 0.570 M solution of sucrose in water?
answer
49.8 g
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What mass of K2CO3 is needed to prepare 200. mL of a solution having a potassium ion concentration of 0.150 M?
answer
2.07 g
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What mass of Na2SO4 is needed to prepare 350. mL of a solution having a sodium ion concentration of 0.125 M?
answer
3.11 g
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What mass of Li3PO4 is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.175 M?
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3.38g
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A 50.0 mL sample of 0.436 M NH4NO3 is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?
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8.72 10-2 M
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A 20.00 mL sample of 0.1015 M nitric acid is introduced into a flask, and water is added until the volume of the solution reaches 250. mL. What is the concentration of nitric acid in the final solution?
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8.12 10-3 M
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A 3.682 g sample of KClO3 is dissolved in enough water to give 375. mL of solution. What is the chlorate ion concentration in this solution?
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8.01 10-2 M
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A 4.691 g sample of MgCl2 is dissolved in enough water to give 750. mL of solution. What is the magnesium ion concentration in this solution?
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6.57 10-2 M
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A 0.9182 g sample of CaBr2 is dissolved in enough water to give 500. mL of solution. What is the calcium ion concentration in this solution?
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9.19 10-3 M
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35.0 mL of 0.255 M nitric acid is added to 45.0 mL of 0.328 M Mg(NO3)2. What is the concentration of nitrate ion in the final solution?
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0.481 M
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17.5 mL of a 0.1050 M Na2CO3 solution is added to 46.0 mL of 0.1250 M NaCl. What is the concentration of sodium ion in the final solution?
answer
0.148 M
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25.0 mL of a 0.2450 M NH4Cl solution is added to 55.5 mL of 0.1655 M FeCl3. What is the concentration of chloride ion in the final solution?
answer
0.418 M
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A 350. mL solution of 0.150 M HNO3(aq) is mixed with a solution of 230. mL of 0.240 M HCl(aq). How many moles of H+(aq) are present in the final solution?
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0.108 moles H+
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A 430. mL solution of 0.230 M HBr(aq) is mixed with a solution of 225 mL of 0.350 M HClO4(aq). How many moles of H+(aq) are present in the final solution?
answer
0.178 moles H+
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A 110. mL solution of 0.340 M HCl(aq) is mixed with a solution of 330. mL of 0.150 M HNO3(aq). The solution is then diluted to a final volume of 1.00 L. How many moles of H+ are present in the final solution?
answer
0.0869 moles H+
question
When 38.0 mL of 0.1250 M H2SO4 is added to 100. mL of a solution of PbI2, a precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and weighed. If the recovered PbSO4 is found to have a mass of 0.0471 g, what was the concentration of iodide ions in the original solution?
answer
3.11 10-3 M
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When 50.0 mL of a 0.3000 M AgNO3 solution is added to 50.0 mL of a solution of MgCl2, an AgCl precipitate forms immediately. The precipitate is then filtered from the solution, dried, and weighed. If the recovered AgCl is found to have a mass of 0.1183 g, what was the concentration of magnesium ions in the original MgCl2 solution?
answer
8.25 10-3 M
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When 20.0 mL of a 0.250 M (NH4)2S solution is added to 150.0 mL of a solution of Cu(NO3)2, a CuS precipitate forms. The precipitate is then filtered from the solution, dried, and weighed. If the recovered CuS is found to have a mass of 0.3491 g, what was the concentration of copper ions in the original Cu(NO3)2 solution?
answer
2.43 10-2 M
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34.62 mL of 0.1510 M NaOH was needed to neutralize 50.0 mL of an H2SO4 solution. What is the concentration of the original sulfuric acid solution?
answer
0.0523 M
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What volume (mL) of a 0.3428 M HCl(aq) solution is required to completely neutralize 23.55 mL of a 0.2350 M Ba(OH)2(aq) solution?
answer
32.29 mL
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What volume (mL) of a 0.2450 M KOH(aq) solution is required to completely neutralize 55.25 mL of a 0.5440 M H3PO4(aq) solution?
answer
368.0 mL
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True or False: A solution is a homogeneous mixture of two or more substances.
answer
True
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True or False: Al(NO3)3 is a strong electrolyte.
answer
True
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True or False: NH4NO3 is a weak electrolyte.
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False
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True or False: H3PO4 is a weak electrolyte.
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True
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True or false: H2CO3is a weak electrolyte.
answer
True
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True or False: CH3OH (methanol) is a weak electrolyte.
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False
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True or False: CH3COOH is a weak electrolyte
answer
True
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True or False: NH3 is a weak electrolyte.
answer
True
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True or False: NH4Cl is a nonelectrolyte.
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False
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True or False: HNO3 is an example of a monoproticacid.
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True
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True or False: H2CO3 is an example of a diproticacid.
answer
True
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Of the following, which is NOT an example of a strong acid?
answer
carbonic acid, H2CO3
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True or False: Na3PO4 is an example of a triproticacid.
answer
False