Question

Asked Mar 25, 2020

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Introduction

The term "**mole**" provides the information about the substance's quantity. If the values of substance's molar mass (in g/mol) and mass (in g) are known, then one can evaluate the total moles of that specific substance.

Given Data:

The volume of solution is 1 L.

The equivalent mass of Mg^{2+} is 4.3 mEq.

Calculations

It is given that the solution contains 4.3 mEq of Mg2+.

Therefore,

The equivalent weight of Mg2+ ion is calculated by using the expression shown below.

The molar mass of Mg2+ ion is 24 g.

Substitute the known values in the above expression.

Put the value of equivalent weight of Mg2+ in the expression (I).

Therefore, 1 L of solution contains 0.052 g of Mg2+.

Now, the number of moles of Mg2+ can be calculated as shown below.

Substitute the known values in the above expression.

The conversion of moles into milimoles can be done as follows:

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