# Resulting ions concentration after mixing solutions

$$\pu{1 g}$$ of $$\ce{NaHCO3}$$ and $$\pu{2 g}$$ of $$\ce{Na2CO3}$$ were dissolved in $$\pu{50 mL}$$ of water known as solution A. Solution A was mixed with $$\pu{450 mL}$$ of $$\pu{0.154 M}$$ of $$\ce{NaCl (aq)}$$ known as solution C. What is the resulting concentration of $$\ce{Cl-}$$ ions and $$\ce{Na+}$$ ions in solution C in $$\pu{mM}?$$

I started of by finding the amounts of $$\ce{NaHCO3}$$ and $$\ce{Na2CO3}$$ which were $$1/84$$ and $$1/53,$$ respectively, but I do not know what to do with these numbers.

• General advice: never omit units and solve the problem algebraically first, plug in the physical quantities second. – andselisk Oct 16 at 8:22
• @Sarahbaker Using algebraic approach does not have only the aspect of advantage of keeping track of proper approach. The another aspect is the community one. The Questions/Answers are here not just for the OP(i.e. you). Many people search solutions for similar problems all the time. It is of much greater value, if the problem is evaluated generally first in algebraic form. If they have to work just with literal numbers of a particular task, it is much less useful, as it is more difficult to orient in the task and generalize to apply elsewhere – Poutnik Oct 16 at 8:43
• @Poutnik It's neither. From Wikipedia: "A physical quantity can be expressed as the combination of a numerical value and a unit. For example, the physical quantity mass can be quantified as n kg, where n is the numerical value and kg is the unit. A physical quantity possesses at least two characteristics in common, one is numerical magnitude and other is the unit in which it is measured." – andselisk Oct 16 at 11:09
• @andselisk Sure . But I had in mind rather symbols versus literal instead of [symbols/values] with units or without them. In case of algebraic expresions units are often implicit, as they can vary and can be implied from symbols. Literals require units explicitly as a unit cannot be implied from a number. – Poutnik Oct 16 at 11:21