pH of a strong acid or alkali
Choose an acid or alkali and its concentration to see the pH and the hydrogen ion concentration.
Learn pH properly
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Questions students ask
Why does diluting an acid ten times raise pH by one?
pH is −log₁₀[H⁺], so a tenfold fall in hydrogen ion concentration raises the pH by exactly one.
What formula does it use?
pH = −log₁₀[H⁺]; for alkalis pH = 14 + log₁₀[OH⁻] at 25 °C.
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