Acid Anhydrides
Chapter 17-8

Dr. Robert Belford & Xiaomin Tu



Question 1
What is the pH of the solution if 0.05mol of SO3 is dissolved in the water to make 1.0L solution? (SO3 is very soluble in water.)
(A)  1.30
(B)  2.50
(C)  2.80
(D)  none of the above
 
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Question 2
How many grams of SO3 is needed to make a 1.0L solution that has a pH=1.0?
(A)  8.0g
(B)  16.0g
(C)  24.0g
(D)  none of the above
 
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Question 3
What is the pH of the solution if 0.002mol of CO2 is dissolved in the water to make 1.0L solution at 25oC and 0.1atm? (The solubility of CO2 in pure water at 25oC and 0.1atm is 0.0037M.) Ka1=4.3x10-7, Ka2 = 5.6x10-11
(A)  3.53
(B)  4.53
(C)  5.53
(D)  none of the above
 
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Question 4
What is the concentration of CO32- ion in the solution in Q4?
(A)  5.6e-10
(B)  4.8e-11
(C)  5.6e-11
(D)  none of the above
 
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Question 5
How many grams of CO2 is needed at 25oC and 0.1atm to make a 1.0L solution that has a pH=4.50?
(A)  0.05g
(B)  0.10g
(C)  0.20g
(D)  none of the above
 
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