Posted by Andres on Tuesday, October 25, 2011 at 3:49pm.
50.0mL x 2.0M Na2CO3 = 100 millimoles Na2CO3 = 200 mmoles Na^+.
100 mL x 3.0M NaHCO3 = 300 mmoles Na^+.
(mmoles Na^+ from 1 + mmoles Na^+ from 2)/total volume in mL = M Na+
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