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Question
Which one of the following aqueous solutions will have a pH of 2.00 at 25 C? (Kw = 1.01 10-14)
A.0.020 M HNO3
B.2.0 M NaOH
C.10.0 M HBr
D.10.0 M KCl
E.0.010 M HCl
Answer
This answer is hidden. It contains 2 characters.
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An aqueous solution with a pH of 2.00 is diluted from 1.0 L to 3.0 L. What is the pH of the diluted solution?
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B.
C.
D.
E.
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If the reaction quotient, Q, is equal to K in a gas phase reaction, then
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For the reaction 2A + B C, the rate law is
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For the reaction A B, the rate law is
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B.
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What is the overall order of the reaction below
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Q:
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Q:
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Q:
What is the half-life of a first-order reaction if it takes 4.4 10-2 seconds for the concentration to decrease from 0.50 M to 0.20 M?A.2.5 10-2 sB.3.3 10-2 sC.1.6 sD.21 sE.27 s
Q:
Hydrogen peroxide decomposes into water and oxygen in a first-order process.
H2O2(aq) H2O() + 1/2 O2(g)
At 20.0 C, the half-life for the reaction is 3.92 104 seconds. If the initial concentration of hydrogen peroxide is 0.52 M, what is the concentration after 7.00 days?
A.1.2 10-5 M
B.0.034 M
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Q:
A student analyzed a first-order reaction and obtained the graph below. Unfortunately, the student forgot to label the axes. What are the correct labels for the x and y axes? A.x axis = time, y axis = ln[A]
B.x axis = ln[time], y axis = [A]
C.x axis = ln[time], y axis = [A]
D.x axis = time, y axis = 1/[A]
E.x axis = 1/time, y axis = 1/[A]