The pH of a solution is 2.55. What is the [H3O+]?

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The pH of a solution is 2.55. What is the [H3O+]?

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RuslanHeatt 5 years 2021-08-12T03:06:15+00:00 1 Answers 13 views 0

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  1. mocmien2
    0
    2021-08-12T03:07:27+00:00
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    Answer:

    [H₃O⁺] ≈ 0.00282 M

    General Formulas and Concepts:

    Acid/Base Equilibria

    Bronsted Acid/Bronsted Base

    pH Formula: pH = -log[H₃O⁺]

    [H₃O⁺] Formula: \displaystyle [H_3O^+] = 10^{-pH}

    Explanation:

    Step 1: Define

    pH = 2.55 (Acidic)

    Step 2: Solve

    1. Substitute in pH [Molar Concentration Formula]:                                              \displaystyle [H_3O^+] = 10^{-2.55}
    2. Evaluate exponent:                                                                                          \displaystyle [H_3O^+] = 0.002818

    Step 3: Check

    Follow sig fig rules and round. We are given 3 sig figs.

    0.002818 M ≈ 0.00282 M

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