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26 January, 09:14

How many liters of a 0.5 m sodium hydroxide solution would contain 2 moles of solute?

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Answers (1)
  1. 26 January, 11:20
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    4 liters

    Explanation:

    1) dа ta:

    a) M = 0.5 M

    Note: since the question is about volume (liters) and moles of solute, the correct unit for the concentration of the hydroxide solution is M (upper case) which is the unit for molarity. Lower case m is used for molality, and you cannot calculate the volume of the solution unless you know some other data, e. g. density of the solution.

    b) n = 2

    c) V (in liters) = ?

    2) Formula:

    Molarity is the number of moles of solute per liter of solution:

    M = n / V (in liters)

    3) Solution:

    a) Clear V from the formula: V (in liters) = M / n

    b) Substitute: V (in liters) = 2 moles / 0.5M = 4 liters ← answer
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