Asolution is prepared by dissolving 10.0 g of nabr and 10.0 g of na2so4 in water to make a 100.0 ml solution. this solution is then mixed with 75.0 ml of a 0.800 m aqueous solution of albr3. calculate the concentration (m) of na+ and br− in the final solution.

Explanation:

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At first, it turns out convenient to compute the total moles of sodium that will be dissolved into the solution by considering the added amounts of sodium bromide and sodium sulfate:

Once we've got the moles we compute the final volume via:

Thus, the molarity of the sodium atoms turn out into:

Now, we perform the same procedure but now for the bromide ions:

Finally, its molarity results:

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