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Posted by on Tuesday, June 16, 2009 at 7:01pm.

How many moles of K3PO4 are required to react completely with 4.5 moles of CaCl2

2K3PO4 + 3CACl -> Ca3(PO4)2 + 6KCL

  • Chemistry - , Tuesday, June 16, 2009 at 8:21pm

    2K3PO4 + 3CaCl2 -> Ca3(PO4)2 + 6KCL
    We use the coefficients in the chemical equation to set up:
    (4.5 mol. CaCl2)(2 mol K3PO4 / 3 mol CaCl2) = ?? _____ moles K3PO4
    Notice I used DOUBLE labels. Do the unit cancellation which can't be shown here.

    NOTE: The above method I used is called the unit factor, factor label, or dimensional analysis method. All chemistry textbooks show it in the answered examples. I highly recommend it.

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