Question 4.1: CALCULATING THE CONCENTRATION OF IONS IN A SOLUTION What is ...

CALCULATING THE CONCENTRATION OF IONS IN A SOLUTION

What is the total molar concentration of ions in a 0.350 M solution of the strong electrolyte $Na_{2}SO_{4}$ , assuming complete dissociation?

STRATEGY
First, we need to know how many ions are produced by dissociation of $Na_{2}SO_{4}$ .
Writing the equation for dissolving $Na_{2}SO_{4}$ in water shows that 3 mol of ions are formed: 2 mol of $Na^{+}$ and 1 mol of $SO_{4}^{2-}$ .

$Na_{2}SO_{4}(s) \underrightarrow{H_{2}O} 2 Na^{+}(aq) + SO_{4}^{2-}(aq)$

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