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pH Calculator
Calculate pH, pOH, and ion concentrations
Formula: pH = −log10[H+] | pOH = −log10[OH-] | pH + pOH = 14 (at 25 °C)
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⚠️ The relationship pH + pOH = 14 strictly holds true at 25 °C. At different temperatures, the self-ionization constant of water ($K_w$) changes, altering the neutral pH point (e.g., neutral water has a pH below 7 at higher temperatures).