What is the molar concentration of a 20% ammonium chloride solution?
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This post was last edited by FORREST_GUMP on 2018-7-19 09:35. What is the value of 20% ammonium chloride solution in terms of mol/mol H2O? My calculation is as follows: assuming 100 g of solution, with 20 g of ammonium chloride and 80 g of water, the number of moles of ammonium chloride is 20/53.5 = 0.374 mol, while the number of moles of water is 80/18 = 4.444 mol. Thus, the ratio is 0.374/4.444 = 0.084 mol/mol H2O. This result differs significantly from what is stated in the books; is my calculation correct?
The calculation is clearly incorrect. Molar concentration is the ratio of mass molarity to volume; it’s the pure molar ratio in your case. Without a density factor, it cannot be calculated.
Thank you for your guidance, expert. Here’s the thing: my ultimate goal is to find the specific heat capacity of an ammonium chloride solution with a mass fraction of 20%. The manual provides values based on molar ratios, and I found that the mass fraction does not correspond to the molar ratio during the conversion process. I would like to ask the experts: according to the data in the manual, what is the molar ratio for an ammonium chloride solution with a mass fraction of 20%?