Question

К 300 г 40% раствора добавили 50 г 25% раствора определить полученную концентрацию

Answer 1

Ответ:

37 6/7 %  (примерно 38%)

Пошаговое объяснение:

Сухого вещества стало (300*40/100)+50*(25/100)=120+12,5=132,5 г

Всего раствора стало 350 г

Концентрация  132,5/350*100%=(1325/35)%=37 6/7 %

Answer 2

Calculation of Concentration

To determine the resulting concentration after adding a 300g 40% solution and a 50g 25% solution, we need to calculate the total amount of solute and the total volume of the resulting solution.

Let's start by calculating the amount of solute in each solution:

- The 300g 40% solution contains 300g x 0.40 = 120g of solute. - The 50g 25% solution contains 50g x 0.25 = 12.5g of solute.

Next, let's calculate the total amount of solute:

- The total amount of solute is 120g + 12.5g = 132.5g.

Now, let's calculate the total volume of the resulting solution. Unfortunately, we don't have information about the densities of the solutions, so we cannot directly calculate the volume. However, we can assume that the volume of the resulting solution is equal to the sum of the volumes of the initial solutions.

Therefore, we need to find the volumes of the initial solutions. Unfortunately, the information provided in the search results does not directly give us the volumes of the solutions. Therefore, we cannot provide an accurate calculation of the resulting concentration.

However, if we make an assumption that the densities of the solutions are equal, we can calculate the volumes using the densities of water (1g/mL). This assumption may not be accurate, but it can give us an approximate result.

Assuming the densities are equal, we can calculate the volumes as follows:

- The 300g 40% solution has a volume of 300g / 1g/mL = 300 mL. - The 50g 25% solution has a volume of 50g / 1g/mL = 50 mL.

Therefore, the total volume of the resulting solution would be 300 mL + 50 mL = 350 mL.

Finally, we can calculate the resulting concentration by dividing the total amount of solute by the total volume of the solution:

- The resulting concentration is 132.5g / 350 mL = 0.3786 g/mL.

Please note that this calculation assumes equal densities for the solutions and may not accurately represent the actual resulting concentration. It is always best to have accurate information about the densities or volumes of the solutions to obtain a precise result.