Which of the following is the most acidic: HBrO_2, HFO_2, HIO_2, and HCIO_3? HBr

Question

Which of the following is the most acidic: HBrO_2, HFO_2, HIO_2, and HCIO_3? HBrO_2 HFO_2 HIO_2 HCIO_3 Which of the following is considered a Lewis acid? CH_2NH_2 BCI_3 F BF_4 CH_4 An 8.0 M solution of formic acid (HCOOH) is 0.47% ionized. What is the K. of formic acid? What is the effect on equilibrium when sodium formate is added to a solution of formic acid? no change in the equilibrium equilibrium shifts to the right more information is needed to answer the question equilibrium shifts to the left Which of the following is an exact or approximate value of the pH at the equivalence point of a titration of a weak acid with a strong base? 3.5 7.0 1.0 14.0 10.5 What is the pH at the equivalence point in the titration of 100 mL of 0.10 M HCI with 0.10 M NaOH ? 1.0 6.0 7.0

Explanation / Answer

13. Most acidic here is,

c) HIO3

14. Lewis acid is one which accepts electrons,

b) BCl3

15. The Ka for formic acid would be,

1.77 x 10^-4

16. Whe sodium formate is added to formic acid

b) equilibrum shifts to the right

17. At equivalence point we would have more OH- in solution thus pH would be close to,

e) 10.5

18. pH at equivalence point would be for titration of strong acid HCl and strong base NaOH,

c) 7.0

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