Chemists often use molarity M , in moles/liter, to measure the concentration of

Question

Chemists often use molarity M, in moles/liter, to measure the concentration of solutions. Molarity is a common unit of concentration because the volume of a liquid is very easy to measure. However, the drawback of using molarity is that volume is a temperature-dependent quantity. As temperature changes, density changes, which affects volume. Volume markings for most laboratory glassware are calibrated for room temperature, about 20?C.

Fortunately, there are several other ways of expressing concentration that do not involve volume and are therefore temperature independentA 2.400

Explanation / Answer

molarity=0.024

moles of solute=molarityxvolume

=0.024mol/Lx0.999L

=0.0239mol

molarity=no of moles/mass of solvent in kg

since we know density and volume, mass=volumex density

=999.4mlxx0.9982g/ml

=997.6g

=0.997Kg

molarity=no of moles/mass of solvent in kg

=0.0239mol/o.997kg=0.0239m

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