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March 27, 2017

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calculate the final concentration if 4.0 L of 1.5 M NaCl and 2.0 L of 3.0M NaCl are mixed.

I am confused about how to calculate the final concentration. We are currently working on solutions. I think first I need to divide the amount of the solution by the amount of the solute and then do the mass percent or do I use moles of a solute divided by L of solution?

  • Chemistry - ,

    Would it be volume divided by moles then convert to g

  • Chemistry - ,

    mols is the only way to go.
    4.0 L x 1.5 M = ?? mols NaCl
    2.0 L x 3.0 M = ?? mols NaCl.
    Total mols NaCl/total L NaCl = M NaCl.

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