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PrincessKK
PrincessKK asked in Science & MathematicsChemistry · 1 decade ago

Molarity questions?

Find the molarity of a solution in which 58 g of NaCl are dissolved in 2.5 L of solution.

thank you

3 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    moles NaCl = 58 / (22.99 +35.45) = 0.9925 mol

    Molarity = 0.9925 / 2.5 = 0.40 mol /L

  • Jess
    1 decade ago

    The formula to find Molarity is

    M = moles of solution / liters of solution

    so if you have 58g of NaCl find the moles

    58g x 1 mol NaCl

    --------------- = 0.99 mol NaCl

    58.44g NaCl

    then you substitute in the formula

    M = 0.99 mol NaCl

    -------------------- = 0.39 molarity

    2.5 L

  • skipper
    Lv 7
    1 decade ago

    58g NaCl = 0.992 mole (58 g / 58.44 g/mol 0.992 mol)

    0.992 mol / 2.5 L = 0.40 M

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