posted by jess .
Calculate the sodium ion concentration when 70 ml of 3.M sodium carbonate is added to 30 ml of 1.M sodium bicarbonate.
moles Na in Na2CO3 = M x L x 2 = ??
moles Na in NaHCO3 = M x L = ??
Total Na = moles Na in #1 + moles Na in #2. then concn Na = moles/L soln.