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Determine the molarity of a solution formed by dissolving 648 mg of MgCl2 in enough water to yield 150.0 mL of solution?

Answer 1

Ellie Andrews

Approx. #0.05*mol*L^-1# with respect to #"magnesium chloride."#

#"Molarity"="Moles of solute"/"Vollume of solution"#

#=((648xx10^-3*g)/(95.21*g*mol^-1))/(150.0xx10^-3*L)=??*mol*L^-1#.

What is the concentration with respect to #Cl^-#?

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Answer 2

Xavier Avery

To determine the molarity of the solution:

Convert the mass of MgCl2 from milligrams to grams.
Calculate the number of moles of MgCl2 using its molar mass.
Determine the volume of the solution in liters (convert mL to L).
Finally, calculate the molarity using the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.