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9 November, 23:22

Calculate the ph of an aqueous solution that is 0.045 m in hcl (aq) at 25°c

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  1. 10 November, 03:19
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    Remember that HCl is a strong acid will dissociate almost 100%

    HCl + H₂O - - > H₃O⁺ + Cl⁻

    pH = - log[H₃O⁺]

    pH = - log (0.045) = 1.35

    (The rules for sig figs are that if you take the log of a number with x significant figures, then the result should have x significant decimal places.)

    The pH is 1.35
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