235 mg of magnesium chloride is added to 125 mL of water. What is the concentration of ions in the solution? A. 0.25 mol/L B. 0.059 M C. 2.47 mol D. 1.88 mol/L E. None of the above

Chemistry: Matter and Change
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Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
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Chapter16: Reaction Rates
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235 mg of magnesium chloride is added to 125 mL of water. What is the concentration of ions in the solution?

A. 0.25 mol/L

B. 0.059 M

C. 2.47 mol

D. 1.88 mol/L

E. None of the above

Expert Solution
Step 1

Molarity (M): Molarity is number of moles of the solute present in the one liter of the solution.

Chemistry homework question answer, step 1, image 1

Convert the given mass of magnesium chloride to moles.

Given: 235 mg

1mg = 0.001g, then, 235mg = 0.235 g.

Moles=MassMolar mass=0.235 g95.211 g/mol=2.47×10-3 mol

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