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(Solved): Calculate the Osmolarity/million molarity (OsM/mOsM) of the following. mOsM of 0.046g MgBr2 in 50 m ...


Calculate the Osmolarity/million molarity (OsM/mOsM) of the following.

mOsM of 0.046g MgBr2 in 50 mL of solution

24. \( \mathrm{mOsM} \) of \( 0.046 \mathrm{~g} \mathrm{MgBr} \) in \( 50 \mathrm{ml} \) of solution

24. of in of solution


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The number of osmoles (Osm) of solute per liter (L) of solution is known as osmolarity, which is a measure of solute concentration. The number of milliosmoles (mOsm) per liter is the definition of the more widely used milliosmolarity (mOsM) unit.

One magnesium ion (Mg2+) and two bromide ions (Br-) separate out of the salt magnesium bromide (MgBr2) in solution. As a result, we obtain three osmoles of particle for every mole of MgBr2.



The number of moles of solute must first be determined in order to determine the osmolarity of a solution. MgBr2 has a molar mass of about 184.11 g/mol (Mg has a mass of 24.31 g/mol and each of the two Br atoms has a mass of 79.9 g/mol). The steps to determine the osmolarity are as follows:



1. Calculate moles of MgBr2:
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