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17 November, 10:48

How many moles of CuSO4 are used to make 250 ml of a 0.50 M CuSO4 solution? A) 0.002 mol B) 0.125 mol C) 0.319 mol D) 0.795 mol

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Answers (2)
  1. 17 November, 11:24
    0
    Answer: 0.125moles

    Explanation:

    From the question above, we are only given the values of the volume and molar concentration of CuSO4 solution.

    Volume of CuSO4 solution = 250mL = 250/1000L = 0.25L

    Molar concentration of CuSO4 solution = 0.50M

    Number of moles of CuSO4 = Molar concentration of CuSO4 * volume of CuSO4

    Number of moles of CuSO4 = 0.50mol/dm^3 * 0.25L

    Number of moles of CuSO4 = 0.125moles

    Therefore 0.125moles of CuSO4 are used to make 250 mL of a 0.50M CuSO4 solution.
  2. 17 November, 14:47
    0
    We have 0.125 moles of CuSO4 (Option B)

    Explanation:

    Step 1: Data given

    Volume = 250 mL = 0.250 L

    Molarity CuSO4 = 0.50 M

    Step 2: Calculate moles

    Molarity = Number of moles / volume (in L)

    Number of moles = Molarity * volume

    Number of moles CuSO4 = 0.50 M * 0.250 L

    Number of moles CuSO4 = 0.125 moles

    We can control this by calculating the molarity:

    0.125 moles / 0.250 L = 0.50 M

    We have 0.125 moles of CuSO4 (Option B)
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