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Measures acidity/basicity of a solution
1.00×10−141.00 \times 10^{-14}1.00×10−14 M2^22
Water molecules reacting with each other to form ions
Water acts as both acid and base
[H3O+]=[OH−]=10−7[\text{H}_3\text{O}^+] = [\text{OH}^-] = 10^{-7}[H3O+]=[OH−]=10−7 M
[H3O+]>10−7[\text{H}_3\text{O}^+] > 10^{-7}[H3O+]>10−7 M
[OH−]>10−7[\text{OH}^-] > 10^{-7}[OH−]>10−7 M
pH=−log10[H3O+]\text{pH} = -\log_{10}[\text{H}_3\text{O}^+]pH=−log10[H3O+]
Neutral = 7, acidic < 7, basic > 7
Each unit = 10× change in [H3O+][\text{H}_3\text{O}^+][H3O+]
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