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Calculate the pH after addition of mL

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Calculate the pH after the addition of 40.00 mL of KOH in the titration of 50.00 mL of 0.12 M HBr with 0.15 M KOH.

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  1. 40.00mL of KOH 0.15M (strong)

    +

    50.00mL of HBr 0.12M (strong)

    =

    90.00mL of

    KOH 0.15M * 40mL/90mL = 0.067M

    +

    HBr 0.12M * 50mL/90mL = 0.067M

    =

    equ.point => pH = 7

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