Question

Сколько потребуется по массе уксуса и воды для приготовления 50г 70% -ного раствора?Сколько нужно прибавить воды полученному раствору, чтобы он стал 9% уксусом?вторая задача основывается на первой

Answer 1

Только запиши ответ, под а) - решение верхней задачи, под б) соответственно нижней

Answer 2

Calculating the Amount of Vinegar and Water Needed

To calculate the amount of vinegar and water needed to make a 50g 70% solution, we can use the following formula:

Amount of Vinegar (AV) + Amount of Water (AW) = Total Weight (TW)

Given: - Total Weight (TW) = 50g - Concentration of Vinegar = 70%

We can use the formula to find the amounts of vinegar and water needed.

First, let's calculate the amount of vinegar needed: AV = TW * (Concentration / 100) AV = 50g * (70 / 100) AV = 50g * 0.70 AV = 35g

So, the amount of vinegar needed is 35g.

Next, we can calculate the amount of water needed: AW = TW - AV AW = 50g - 35g AW = 15g

So, the amount of water needed is 15g.

Adjusting the Solution to 9% Vinegar

To adjust the solution to 9% vinegar, we need to add water. Let's calculate the amount of water needed to achieve a 9% vinegar solution.

Given: - Initial amount of vinegar = 35g - Initial amount of water = 15g - Final concentration of vinegar = 9%

We can use the formula for dilution to find the amount of water needed to achieve the desired concentration.

AV1 = AV2 AV1 = 35g (initial amount of vinegar) AV2 = (TW2 * 9) / 100 TW2 = AV2 / (9 / 100) TW2 = 35g / (9 / 100) TW2 ≈ 388.89g

So, to achieve a 9% vinegar solution, we need to add approximately 388.89g of water to the initial solution.

Conclusion

To make a 50g 70% vinegar solution, you would need 35g of vinegar and 15g of water. To adjust this solution to a 9% vinegar concentration, you would need to add approximately 388.89g of water.

Let me know if there is anything else I can help you with!