For each of the following solutions, describe the deviation with respect to Raoult’s Law.
acetone (C3H6O) and water
A)relatively ideal
B)positive deviation
C)negative deviation
D)more information needed
E)none of these
How many of the following molecules or ions are linear?
NH3OF2HCNCO2NO2
A)0
B)1
C)2
D)3
E)4
What is the pH for a buffer that consists of 0.45 M benzoic acid, C6H5COOH and 0.40
M potassium benzoate C6H5COOK? Kaof C6H5COOH = 6.4 x 10-5
A)
Which of the following compounds IS chiral (has optical isomers)?
A) 2,4-dimethylpentane
B) 2-methylhexane
C) 4-methylheptane
D) 3-methylpentane
E) None of these is chiral
Which of the following, upon reacting with oxygen, would form the greatest amount of
carbon dioxide?
A) n-pentane
B) isopentane
C) neopentane
D) Two of the above would form equal amounts.
E) All (A-C) of the above would form equal amounts.
Balance the following redox equation in basic solution. What is the coefficient of the
water? NO2
–(aq) + Al(s) –> NH3(g) + AlO2
–(aq)
A) 1
B) 2
C) 4
D) 6
E) 7
Which of the following lists of atoms are arranged in order of INCREASING first
ionization energy?
A)Li < O < N < F
B)Li < N < O < F
C)F < O < N < Li
D)Na < Sr < O < F
E)Ca > Cs > S > Se
Nitric acid, HNO3, was first prepared 1200 years ago by heating naturally occurring
sodium nitrate (called saltpeter) with sulfuric acid to produce sodium bisulfate and
collecting the vapors of HNO3produced. Calculate DH°rxnfor this reaction.
DH°f[NaNO3(s)] = -467.8 kJ/mol; DH°f[NaHSO4(s)] = -1125.5 kJ/mol;
DH°f[H2SO4(l)] = -814.0 kJ/mol; DH°f[HNO3(g)] = -135.1 kJ/mol.
NaNO3(s) + H2SO4(l) => NaHSO4(s) + HNO3(g)
A)-644.2 kJD)644.2 kJ
B)-21.2 kJE)-1606.8 kJ
C)21.2 kJ
Calculate Kspfor the salt NaCl at 25°C.
A) 41
B) 1.7 x 1019
C) 9.2
D) 4.1
E) 0.41
Which of these solutions 0.1 m NaCl, 0.15 m glucose, 0.1 m CaCl2would have
I. the highest vapor pressure
II. the lowest boiling point
A)0.1 m CaCl2, 0.1 m CaCl2
B)0.15 m glucose, 0.1 m CaCl2
C)0.1 m CaCl2, 0.15 m glucose
D)0.15 m glucose, 0.15 m glucose
E)0.1 m NaCl, 0.1 m CaCl2
Which of the following statements is true?
A)Ionic compounds with a high lattice energy will be very soluble.
B)The solubility of a gas in a liquid always increases as the temperature rises.
C)Some mixtures that have an ENDOTHERMIC heat of solution will happen due to a
decrease in entropy.
D)NaCl(s) has a smaller (less exothermic) Hhydthan MgS(s).
E)All of these are false.
Which set contains the atoms listed in order of INCREASING electronegativity?
A)F < N < C < Si
B)P < N < O < F
C)N < O < Cl < F
D)F > O > S > Si
E)S > O > Cl > F