Question

hydrofluoric acid is a weak acid used in the building industry to etch patterns into glass for elegant windows. because it dissolves glass, it is the only inorganic acid that must be stored in plastic containers. a 0.1 m solution of hf has a ph of 2.1 . calculate [ h 3 o ] in this solution.

Answer 1

The concentration of H3O+ ions in a 0.1 M solution of hydrofluoric acid with a pH of 2.1 is approximately 0.00794 M.

Step-by-step explanation:

The pH of a solution is a measure of its acidity or alkalinity. In this case, a 0.1 M solution of hydrofluoric acid (HF) has a pH of 2.1. The concentration of H3O+ ions in the solution can be determined using the equation: pH = -log[H3O+].

Therefore, rearranging the equation, we can find the concentration of H3O+ ions: [H3O+] = 10^(-pH). Substituting the given pH value of 2.1 into the equation, we get [H3O+] = 10^(-2.1), which is approximately 0.00794 M.

So, the concentration of H3O+ ions in the 0.1 M solution of HF is approximately 0.00794 M.