Using the table of pK a values, rank the following molecules in order of increas

Question

Using the table of pKa values, rank the following molecules in order of increasing acid strength (4= least acidic, 1= most acidic).

HCl - HOCOOH - C5H5NH+ - C2H5NH3+

Using the table of pKa values found here, rank the following molecules in order of increasing base strength (4= least basic, 1= most basic).

C6H5O

PO43

C3H5O(COO)3

NO3

Rank the following molecules in order of increasing acid strength (4= least acidic, 1= most acidic).

and the last one is with 2 I instead of the 2 cl or br( i could not baste it)

Rank the following molecules in order of increasing acid strength (3= least acidic, 1= most acidic).

Determine whether the predominant form of the following amphoteric species (indicated in bold) is acidic, basic, or neutral.
hydrogen chromate ion - HCrO4  (chromic acid - H2CrO4: pKa1 = 0.74; pKa2 = 6.49)

hydrogen tellurate ion - HTeO4  (telluric acid - H2TeO4: pKa1 = 7.68; pKa2 = 11)

Explanation / Answer

C2H5NH3+<C5H5NH+<HCOOH < Hcl increasing order of acidic strength

NO3- <PO43- <C3H5O(COO)3 <C6H5O- inceasing order of basic nature

4,4 dibromobutanoic acid<4,4 dichlorobutanoic acid

6-fluoroheptanoic acid<6,6 difluoroheptanoic acid

telluric acid weak acid than chromic acid

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