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Question
Which of the following weak acids has the strongest conjugate base in an aqueous solution?
A.formic acid (HCO2H), Ka = 1.8 10-4
B.hypobromous (HOBr), Ka = 2.5 10-9
C.hydrogen sulfite ion (HSO3-), Ka = 6.2 10-8
D.nitrous acid (HNO2), Ka = 4.5 10-4
E.phosphoric acid (H3PO4), Ka = 7.5 10-3
Answer
This answer is hidden. It contains 2 characters.
Related questions
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Q:
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Q:
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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
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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]
Q:
________ are colloidal dispersions of one liquid in another liquid.