Sample Midterm
Chem quiz
1 / 1 point
Qualitatively predict the acidity/basicity of a 1.0 M solution of
H3O+HSO41) Weakly Acidic
2) Strongly Basic
3) Neutral
4) Strongly Acidic
5) Weakly Basic
1 / 1 point
Which indicator is best suited for the titration of 0.05 M
C5H5N (pKb = 8.82) with 0.05 M HCl?
1) Phenol red (pKHIn = 7.60)
2) Bromophenol blue (pKHIn = 3.80)
3) Alizarin yellow-R (pKHIn = 11.15)
4) Methyl red (pKHIn = 5.30)
5) Thymolphthalein (pKHIn = 9.85)
1 / 1 point
What is the pH of a solution that is 2.0 M CH 3COOH and 0.25 M
CH3COONa? (CH3COOH ; Ka = 1.8 x 10-5)
A) 3.84
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Sample Midterm
B) 5.34
C) 4.93
D) 4.21
E) 4.74
1 / 1 point
10.00 mL of a weak acid solution, HA (Ka = 2.63 × 10-7) is
titrated with a strong base (0.100 M). If 3.98 mL of base gives a
pH of 6.475, what is the concentration (in mol L-1) of the
original weak acid solution?
1) 0.159
2) 0.0764
3) 0.193
4) 0.0905
5) 0.142
1 / 1 point
In the reaction, 2A + B →
3C + 4D, the average rate of
reaction is given by
A) Δ[A]/(2Δt)
B) (-2Δ[B])/(3Δt)
C) Δ[C]/(3Δt)
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Sample Midterm
D) (-4Δ[D])/Δt
E) (4Δ[D])/Δt
100 %
100 %
Done
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