Question

what is the hydronium ion concentration, at equilibrium, of a solution whose ph is 7.82 at 25 oc? group of answer choices 1.5 x 10-8 1.0 x 10-14 6.6 x 107 1.0 x 10-7

Answer 1

The hydronium ion concentration at equilibrium for a solution with a pH of 7.82 at 25 °C is 1.5 × 10^-8 M. Therefore, the correct option is A.

Step-by-step explanation:

The question asks about the hydronium ion concentration in a solution with a known pH value at a specific temperature. To find the hydronium ion concentration for a solution with a pH of 7.82, we use the formula:

pH = -log[H3O+]

Invert this relationship to solve for the hydronium ion concentration:

[H3O+] = 10-pH

So:

[H3O+] = 10-7.82

[H3O+] = 1.5 × 10-8 M

This is the concentration of hydronium ions at equilibrium for a solution with a pH of 7.82 at 25 °C.

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