Calculate the sodium ion concentration when 50.0 mL of 2.0 M Na2CO3 is added to

Question

100.0 mL of 3.0 M NaHCO3

Answer 1

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+