Question

Calculate total mass NaNo3 and percent concentration of salt by mass in the new solution if we have poured two solutions: 250g solutions with 10% and 300g solution with 20% СРОЧНО! ДАЮ 100 БАЛЛОВ

Answer 1

Ответ:

m(Sol)=250+300=550 g

m(NaNO3)=250*0.1+300*0.2=25+60=85 g

W(NaNO3)=85/550=0,1545 - 15.45 percent

Answer 2

To calculate the total mass of NaNO3 and the percent concentration of salt in the new solution, we need to determine the amount of NaNO3 in each solution and then add them together.

Let's calculate the mass of NaNO3 in the first solution: Mass of the first solution = 250g Concentration of NaNO3 in the first solution = 10%

Mass of NaNO3 in the first solution = (10/100) * 250g = 25g

Now, let's calculate the mass of NaNO3 in the second solution: Mass of the second solution = 300g Concentration of NaNO3 in the second solution = 20%

Mass of NaNO3 in the second solution = (20/100) * 300g = 60g

Now, we can add the masses of NaNO3 in both solutions to find the total mass of NaNO3 in the new solution: Total mass of NaNO3 = 25g + 60g = 85g

To calculate the percent concentration of NaNO3 in the new solution, we need to divide the mass of NaNO3 by the total mass of the new solution and then multiply by 100:

Percent concentration of NaNO3 = (85g / (250g + 300g)) * 100 = (85g / 550g) * 100 ≈ 15.45%

Therefore, the total mass of NaNO3 in the new solution is 85g, and the percent concentration of NaNO3 by mass in the new solution is approximately 15.45%.