Respuesta :
A 50% by mass solution of methanol has a concentration that is around 1.43 times that of an ethanol solution.
What is the concentration?
- 50% by mass, thus, is defined as 50% mass/100 g of solution. As a result, our solutions contain either 50 grams of ethanol with 50 grams of water for a total of 100 grams, or 50 grams of methanol with 50 grams of water.
- The first is that water, ethanol, and methanol have densities of 0.79, 0.79, and 1, respectively. Therefore, the volume of 50 g of methanol and 50 g of ethanol will be the same (39.5 mL for each), and the same amount of water (50 mL) will be used to obtain the mL.
- Because of the difference in molecular weight, the difference will thus be in concentration. Methanol and ethanol each have a molecular weight of 46.1 and 32 g/mole, respectively.
50 grams of methanol = [tex]\dfrac{50}{32}[/tex] = 1.56 mol
50 grams of ethanol =[tex]\dfrac{ 50}{46.1}[/tex] = 1.09 mol
- Therefore, based on the quantities, the methanol concentration will be 17.43M and 12.17 M for ethanol. Therefore, a 50% by mass solution of methanol has a concentration that is around 1.43 times that of an ethanol solution.
To learn more about concentration with the given link
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