G.21

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705088777
Posts: 37
Joined: Fri Sep 28, 2018 12:18 am

G.21

Postby 705088777 » Mon Oct 08, 2018 7:56 pm

How do I find the concentration of ions in a solution? Do I need to write a net ionic equations?
Question: A solution is prepared by dissolving .500g KCL, .500g K2S, and .500g K3PO4 in 500. ml of water. What is the concentration in the final solution of (a)potassium ions; (b) sulfide ions?

Rachana Jayaraman 1H
Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

Re: G.21

Postby Rachana Jayaraman 1H » Mon Oct 08, 2018 8:23 pm

You should first find the moles of each of the compounds and then use molar ratios to find the appropriate amount of K+ for part a and S2- ions for part b from each compound. You can then add the total moles of the ions and divide by the volume of the solution, or in this case 500. mL (0.500 L)


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