Chemistry

How many grams of KOH must be dissolved in one litre of solution to give it a pH value of 12?

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  1. pH + pOH = 14
    Solve for pOH.

    pOH = -log(OH^-)
    Solve for OH^-

    How many moles KOH do you need?
    moles KOH = M x L = ??
    Then moles = grams/molar mass
    Solve for grams.
    .

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  2. PH PoH =14
    PoH=14-12=2
    PoH=-log[OH]
    OH=log~[-2]
    OH=O.O1
    NOW,
    MOLARITY=gm/litre|AT.wt
    O.O1=gm/1|57
    gm=0.57
    hence mass of kOH IS O.57gm.

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