🍋 Acids, Bases & pH

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Calculate the pH of strong acid and base solutions and of buffers, and convert between pH, pOH and ion concentrations at 25 °C.

Calculate pH, pOH, hydrogen ion concentration [H⁺] and hydroxide ion concentration [OH⁻] from any one of them, at 25 °C.

Calculate the pH of a buffer solution with the Henderson–Hasselbalch equation pH = pKa + log([A⁻]/[HA]). Enter pKa or Ka and the concentrations of the salt and acid.