Question

Смешали 200 гр 30 процентного раствора и 800 гр 50 процентного раствора. Найти массовую долю растворенного вещества в новом растворе.

Answer 1

W= (200*0.3 + 800*0.5)/ 200+800= (60+400)/ 1000=460/1000=0.46=46%

Answer 2

Calculation of Mass Fraction of Solute in the New Solution

To find the mass fraction of the solute in the new solution, we need to calculate the total mass of the solute and the total mass of the solution.

Given: - 200 grams of a 30% solution - 800 grams of a 50% solution

To calculate the total mass of the solute, we can add the masses of the solute in each solution: - For the 30% solution: 30% of 200 grams = 0.3 * 200 grams = 60 grams - For the 50% solution: 50% of 800 grams = 0.5 * 800 grams = 400 grams

The total mass of the solute in the new solution is the sum of these two values: - Total mass of the solute = 60 grams + 400 grams = 460 grams

To calculate the total mass of the solution, we can add the masses of the two solutions: - Total mass of the solution = 200 grams + 800 grams = 1000 grams

Finally, we can calculate the mass fraction of the solute in the new solution by dividing the total mass of the solute by the total mass of the solution and multiplying by 100: - Mass fraction of the solute = (460 grams / 1000 grams) * 100 = 46%

Therefore, the mass fraction of the solute in the new solution is 46%.

Please note that the calculations above are based on the assumption that the solute is uniformly distributed in the solution and that there is no interaction between the solute and the solvent that would affect the concentration.