Problem: A 4.691 g sample of MgCl2 is dissolved in enough water to give 750 mL of solution.  What is the magnesium ion concentration in this solution? A)  3.70 x 10–2 M              B)  1.05 x 10–2 M              C)  6.57 x 10–2 M               D)  4.93 x 10–2 M              E)  0.131 M

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Problem Details

A 4.691 g sample of MgCl2 is dissolved in enough water to give 750 mL of solution.  What is the magnesium ion concentration in this solution?

A)  3.70 x 10–2 M             

B)  1.05 x 10–2 M             

C)  6.57 x 10–2 M              

D)  4.93 x 10–2 M             

E)  0.131 M

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Our tutors have indicated that to solve this problem you will need to apply the Molarity concept. You can view video lessons to learn Molarity. Or if you need more Molarity practice, you can also practice Molarity practice problems.

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Based on our data, we think this problem is relevant for Professor Rines' class at PBCC.