1. How many moles of H+(aq) ions are present in 1.25 L of 0.75 M nitric acid?
A. 0.60 mol
B. 0.75 mol
C. 0.94 mol
D. 1.7 mol
E. 1.9 mol 2. Which of the following will be least soluble in water?
A. potassium sulfate, K2SO4
B. ammonium nitrate, NH4NO3
C. chloromethane, CH3Cl
D. calcium chloride, CaCl2
E. ethanol, C2H6O 3. Select the precipitate that forms when the following reactants are mixed.
Mg(CH3COO)2(aq) + LiOH(aq)
E. CH3OH 4. Select the precipitate that forms when aqueous lead(II) nitrate reacts with aqueous sodium sulfate.
E. PbS 5. Consider the reaction:
3Co2+(aq) + 6NO3¯(aq) + 6Na+(aq) + 2PO43¯(aq)
Co3(PO4)2(s) + 6Na+(aq) + 6NO3¯(aq)
Identify the net ionic equation for this reaction.
A. Na+(aq) + NO3¯(aq) NaNO3(aq)
B. 3Co2+(aq) + NO3¯(aq) + Na+(aq) + 2PO43¯(aq) Co3(PO4)2(s) + NaNO3(aq)
C. 3Co2+(aq) + 6NO3¯(aq) + 6Na+(aq) + 2PO43¯(aq) Co3(PO4)2(s) + 6NaNO3(aq)
D. 3Co2+(aq) + 2PO43¯(aq) Co3(PO4)2(s)
E. None of these choices is correct. 6. A base
A. causes phenolphthalein indicator to change from colorless to pink.
B. donates a proton in a proton transfer reaction.
C. accepts electrons in an electron transfer reaction.
D. produces hydrogen ions in solution.
E. does none of these choices. 7. Ammonia, NH3, produces hydroxide ions in aqueous solution by
A. donating a proton to an acid molecule.
B. donating a proton to a water molecule.
C. donating a hydrogen ion to a water molecule.
D. accepting an electron from an acid molecule.
E. accepting a proton from a water molecule. 8. Select the best statement relating to the following reaction:
2MnO2(s) + KClO3(aq) + 2KOH(aq) 2KMnO4(aq) + KCl(aq) + H2O(l)
A. Mn in MnO2 is oxidized.
B. O in KClO3 is the oxidizing agent.
C. K in KClO3 is the reducing agent.
D. H in KOH is oxidized.
E. Cl in KClO3 is the reducing