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  • Calculating KOH Solution Preparation: Grams of KOH for 2M Solution
    Here's how to calculate the grams of KOH needed:

    1. Determine the molar mass of KOH:

    * K (Potassium) = 39.10 g/mol

    * O (Oxygen) = 16.00 g/mol

    * H (Hydrogen) = 1.01 g/mol

    * Molar mass of KOH = 39.10 + 16.00 + 1.01 = 56.11 g/mol

    2. Calculate the moles of KOH needed:

    * Molarity (M) = moles of solute / liters of solution

    * We have 2 M solution and 60 mL (0.06 L)

    * Moles of KOH = 2 M * 0.06 L = 0.12 moles

    3. Convert moles to grams:

    * Grams of KOH = moles of KOH * molar mass of KOH

    * Grams of KOH = 0.12 moles * 56.11 g/mol = 6.73 g

    Therefore, you need 6.73 grams of solid KOH to prepare a 60 mL 2 M solution.

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