Question

сколько грамов сульфата меди и воды надо взять чтобы приготовить 250 грамм 25% раствора

Answer 1

m(CuSO4) = 250* 0.25=62.5г

Answer 2

Calculating the Amount of Copper Sulfate and Water Needed

To calculate the amount of copper sulfate and water needed to prepare a 250-gram 25% solution, we can use the formula for calculating the concentration of a solution:

Concentration = (mass of solute / total mass of solution) * 100

Given: - Total mass of the solution (water + copper sulfate) = 250 grams - Desired concentration of the solution = 25%

Using the formula, we can calculate the mass of copper sulfate needed and the mass of water needed.

Calculating the Mass of Copper Sulfate Needed

Let's denote: - Mass of copper sulfate as x grams - Mass of water as (250 - x) grams

Using the concentration formula: 25% = (x / 250) * 100

Solving for x: x = (25/100) * 250 x = 62.5 grams

So, 62.5 grams of copper sulfate is needed.

Calculating the Mass of Water Needed

The mass of water needed can be calculated as: 250 - 62.5 = 187.5 grams

Therefore, to prepare a 250-gram 25% solution, you would need 62.5 grams of copper sulfate and 187.5 grams of water.

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