Question

Сколько граммов воды и сахара нужно взять, чтобы приготовить 200 грамм 15% раствора? (Дано, решение, ответ)

Answer 1

дано

mр-ра=200г

w=15%=0,15

найти

m(cахара)

m(H2O)

 

решение

 

mсахара=w*mр-ра

 

mсахара=0,15*200г=30г

масса воды=масса раствора-масса сахара

масса воды=200-30=170г

 

Answer 2

Calculating the Amount of Water and Sugar Needed for a 200-Gram 15% Solution

To calculate the amount of water and sugar needed to prepare a 200-gram 15% solution, we can use the formula for calculating the concentration of a solution:

Concentration = (Mass of solute / Total mass of solution) * 100

Given that we want to prepare a 200-gram 15% solution, we can use the following steps to find the amount of water and sugar needed.

1. Calculating the Amount of Sugar (Solute) Needed: - Using the formula for concentration, we can rearrange it to solve for the mass of the solute: Mass of solute = (Concentration * Total mass of solution) / 100 - Substituting the given values, we get: Mass of solute = (15 * 200) / 100 = 30 grams

2. Calculating the Amount of Water (Solvent) Needed: - Since the total mass of the solution is 200 grams and the mass of the solute (sugar) is 30 grams, the mass of the water needed can be calculated as: Mass of water = Total mass of solution - Mass of solute Mass of water = 200 - 30 = 170 grams

Therefore, to prepare a 200-gram 15% solution, you would need to take 30 grams of sugar and 170 grams of water.

Cited Sources

1. Source 8: "3 200 6,25%- ." 2. Source 5: "- -, 200 2,5 ." 3. Source 2: "( ) 20,0 , : V = 200 + (202) = 240 (). ."