PLEASE HELP!!!!!
The pH of a solution is 3.40. What is the [H3O+] for the solution?


2.51 × 10−4 M

3.98 × 10−4 M

2.51 × 103 M

3.98 × 104 M

Respuesta :

Answer:

3.98 x 10⁻⁴ M.

Explanation:

∵ pH = - log[H₃O⁺]

∴ 3.4 = - log[H₃O⁺].

∴ log[H₃O⁺] = - 3.4.

∴ [H₃O⁺] = 3.98 x 10⁻⁴ M.

Answer: The hydronium ion concentration for the solution is [tex]3.98\times 10^{-4}M[/tex]

Explanation:

pH is defined as the negative logarithm of hydrogen ion concentration or hydronium ion concentration present in a solution.

To calculate the pH of the reaction, we use the equation:

[tex]pH=-\log[H_3O^+][/tex]

We are given:

pH of the solution = 3.40

Putting values in above equation, we get:

[tex]3.40=-\log[H_3O^+][/tex]

[tex][H_3O^+]=3.98\times 10^{-4}M[/tex]

Hence, the hydronium ion concentration for the solution is [tex]3.98\times 10^{-4}M[/tex]

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