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chemistry calculations HELP!

  • 06-10-2010 10:42am
    #1
    kaalgat
    Registered Users, Registered Users 2 Posts: 136 ✭✭


    Hi all,

    I have come across a little problem with molarity concentrations that no one in my lab can help me with..

    I am mixing 2 solutions:

    1. ferrocene, 1ml of 0.01M solution in dichloromethane
    2. support electrolyte, 29ml of 0.1M solution in dichloromethane

    If I were to mix these 2 solutions I get a total volume of 30 ml.

    How can I calculate the new molarities of each of these solutions independently?

    I have used the (m1.v1 + m2.v2) / (v1 + v2), but this calculation only gives me one answer of 0.097M.

    0.097M of what? Which solution, and how can I calculate the molarity of the other solution?

    Any help would be so much appreciated! Thank you!


Comments

  • #2
    hairyeggs
    Registered Users, Registered Users 2 Posts: 22 ✭hairyeggs


    1. Calc. the number of moles of ferrocene (0.001L x 0.01mol/L). Then find conc. when you place X moles of ferrocene in 30mls of solution (X mol / .030L)
    2. Repeat as above for electrolyte.


  • #3
    kaalgat
    Registered Users, Registered Users 2 Posts: 136 ✭✭kaalgat


    Thank you so much!

    Silly how one can forget 1st year chemistry so quickly! :rolleyes:


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