indicate the concentration of each ion present in the solution formed by mixing the following?

18.0mL of 0.200 M Na2SO4 and 15.0 mL of 0.150 M KCL.....

I CANT SEEM TO FIGURE OUT THIS QUESTION FOR MY LIFE!!!

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  • 1 decade ago
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    To solve this question, you have to find out the total number of moles contribute by individual solution, then divide by the total volume.

    Every Na2SO4 molecule will dissolve and give 2 Na+ ion and 1 SO42- ion, while every KCl molecule gives 1 K+ and 1 Cl- ion.

    # of mole of Na+ = 0.2 * 0.018 *2 = 0.0072 moles

    [Na+] = 0.0072 / (0.018 + 0.015) = 0.218 M

    [SO42-] = 0.2 * 0.018 / 0.033 = 0.109 M

    [K+] = 0.15 * 0.015 / 0.033 = 0.068 M

    [Cl-] = 0.15 * 0.015 / 0.033 = 0.068 M

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