Author Question: The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 C is 2.03. What is the value ... (Read 44 times)

Hungry! · **on:** Aug 27, 2018

The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 C is 2.03. What is the value of Ka for HF?

A) 2.0 10-9
B) 1.1 10-9
C) 6.0 10-5
D) 3.5 10-4
E) none of the above

Question 2

What is the electron configuration for the Co2+ ion?

A) Ar4s13d6
B) Ar3d7
C) Ar3d5
D) Ar4s23d9
E) Ne3s23p10

Question 3

The balanced half-reaction in which dichromate ion is reduced to chromium metal is a ________ process.

A) two-electron
B) six-electron
C) three-electron
D) four-electron
E) twelve-electron

shoemake · **Reply #1 on:** Aug 27, 2018

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