Question

A solution contain 30 gm of sugar dissolved in 370 gm of water.calculate the concentration of this solution

Answer 1

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Concentration can be expressed in several ways, I'm expressing it in molarity here.
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Molarity of solute is no. Of moles of solute per litre of solution, ignoring the volume of sugar here
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We get Molarity = no. Of moles/Volume of solution (in litres)$<b><font face =copper black size=4 color=red>$


= (30(given mass)/342(molecular mass of sugar))/0.37 (volume of water in liters)
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= 0.23 Moles/litre
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Ps. Remember we had ignore the volume of sugar here. A better way of expressing the concentration here would be molality which is equal to no. Of moles of solute per kg of solvent which will be same in this case
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= (30/342)/0.37(mass of water in kg) = 0.23