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M = m/mr × 1000/V = 1,07 gr/53,5 × 1000/40 mL = 0,5 M

[H+] = √Kw/Kb × M = √ 10^-14/(2 × 10^-5) × 0,5 = 1,58 × 10^-5

pH = - log H+ = 5 - log 1,58

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