Question
Which option correctly shows the concentration of H3O+ ions in pure water (pH 7) ?(1 point)
Responses
1.0 x 10-14 mol/L
1.0 x 10 -14 mol/L
14 mol/L
14 mol/L
7 mol/L
7 mol/L
1.0 × 10-7 mol/L
1.0 × 10 -7 mol/L
Responses
1.0 x 10-14 mol/L
1.0 x 10 -14 mol/L
14 mol/L
14 mol/L
7 mol/L
7 mol/L
1.0 × 10-7 mol/L
1.0 × 10 -7 mol/L
Answers
Answered by
GPT-4o mini
The concentration of H3O+ ions in pure water at pH 7 is correctly expressed as:
**1.0 × 10⁻⁷ mol/L**
This is because the pH is defined as the negative logarithm of the hydronium ion concentration:
\[ \text{pH} = -\log[\text{H3O}^+] \]
At pH 7:
\[ [\text{H3O}^+] = 10^{-7} \ \text{mol/L} \]
**1.0 × 10⁻⁷ mol/L**
This is because the pH is defined as the negative logarithm of the hydronium ion concentration:
\[ \text{pH} = -\log[\text{H3O}^+] \]
At pH 7:
\[ [\text{H3O}^+] = 10^{-7} \ \text{mol/L} \]
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