 Chemistry Help Forum Density of sucrose solution
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 Thread Tools Display Modes Sep 29th 2017, 08:04 AM #1 mottman Junior Member   Join Date: Sep 2017 Location: Tucson Posts: 1 Density of sucrose solution How do I calculate the density (g/ml) of a sucrose solution if the concentration of the sucrose (g/L) in the solution is known? I can solve this problem if I know the concentration of sucrose on a wt/wt basis (g/g). For example, if the density of a sucrose solution is 150 g/kg, in 1 kg of this solution there would 150 g of sugar and 850 g of water. The volume of 150 g of sugar would be 150 g / density of sucrose (1.587 g/ml) = 94.5 ml. The volume of water would be 850 g/ density of water (1 g/ml) = 850 ml. The volume of a 1000 g solution would be 850 ml + 94.5 ml = 944.5 ml. The density of the solution would be 1000 g/ 944.5 ml = 1.059 g/ml which agrees closely with table values. Where I am stuck is calculating how many grams of sucrose would be in 1 kg of solution and having density of sucrose in terms of g/ml since the units do not seem to cancel properly. Thanks. Last edited by mottman; Sep 29th 2017 at 04:24 PM.   Jan 31st 2018, 05:22 PM #2 dilueur Junior Member   Join Date: Apr 2012 Posts: 7 Hello, It's just impossible by reasoning as you do. We can add the masses but not necessarily the volumes. 1 L of water + 1 L of water = 2 L 1 L of water + 1 L of alcohol = 1.92 L C'est la vie... ! One can, mathematically, approach the density of a solution according to the percentage (w/w) of this solution, but with formulas "as long as the arm" ...  Thread Tools Show Printable Version Email this Page Display Modes Switch to Linear Mode Hybrid Mode Switch to Threaded Mode 