Question

40. What is the molality of a 30.0% by mass hydrochloric acid solution? The density of the solution is 1.1493 g/mL. a. 0.300 m b. 9.46 m 11.8 m 0.0345 m e. 9.30 m work?

Answer 1

please rate

30%. by mass Hol solution means 30g of Hol is present in 100 g of solution. solution - mass a 100g mass of Hol mass of HCl = 30g mass of weater (solvent) = mass of solution - = 100 g - 30 g = 70g = 0.070 kg (1000g = 1kg) mass of HCl = 30.09. molar mas of HCl = 36.5 gimol moles of HCl = mass molar mas = 30.09 36,5 g/mol - 01822 mol Daddy molality of solution = moles of HCl man of Berlin water (solvent) 0.822 mol 0.070 kg 11.8 m = Hence, option c is correct.