The ka of hydrofluoric acid (hf) at 25.0 degrees celsius is 6.8*10-4. what is the ph of a 0.15m aqueous solution of hf? the ka of hydrofluoric acid (hf) at 25.0 c is 6.8 x10-4. what is the ph of a 0.15 m aqueous 8) solution of hf? a) 4.60 b) 0.82 c)3.64 d) 1.17 e) 2.00

E) 2.00

Explanation:

Step 1. Calculate the concentration of hydronium ion

We can use an ICE table to organize the calculations.

                      HF + H₂O ⇌ H₃O⁺ + F⁻

I/mol·L⁻¹:       0.15                   0       0

C/mol·L⁻¹:      -x                     +x      +x

E/mol·L⁻¹:   0.15 - x                 x        x

Step 2. Calculate the pH

a polar bond is formed when electrons are shared unevenly between atoms