Chemistry help. Explain (very briefly) why if possible. Thanks guys! If the pH a

Question

Chemistry help.

Explain (very briefly) why if possible. Thanks guys!

If the pH at one-half the first and second equivalence points of a diprotic acid is 3.20 and 7.45, respectively, which of the following is correct? a. pKal = 3.20 b. Ka2 = 7.45 c. Ka2= 10^-3.20 d. pKa2 = 10^-745 Which reagent can be used to precipitate Group I cations? a. NH3 b. HCI c. H2S d. CH3CSNH2 Which kind of test paper should be used if you need to adjust the pH sim 0.5? a. Red litmus paper b. Blue litmus paper c. Short range alkacid paper d. Wide range alkacid paper

Explanation / Answer

1-c

2-d

3-b

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