Question

ПОМОГИТЕ ПОЖАЛУЙСТА! ЗАДАНИЕ: в результате выпаривания 120 г раствора сахара образовалось 16 г сухого остатка вычислите массовую долю сахара в исходном растворе и массу воды в растворе. Нужно подробное решение и ответ!

Answer 1

Ответ:

13.3% сахара было в растворе. Масса воды 104 гр

Объяснение:

Мы знаем m(р-ра) =120 гр и мы знаем сколько было сахара в растворе m(сахара) =16 гр

1. По формуле w=m(сахара) /m(р-ра) найдем массовую долю сахара в растворе w=16/120=0,133 или 13,33%

2.Найдем m(H2O) =m(р-ра) - m(сахара)

m(H2O) = 120-16=104 гр

Answer 2

Calculation of the Mass Fraction of Sugar in the Initial Solution

To calculate the mass fraction of sugar in the initial solution, we need to use the given information that 120 g of sugar solution yielded 16 g of dry residue after evaporation.

Let's denote the mass of sugar in the initial solution as m_sugar and the mass of water in the solution as m_water.

We can set up the following equation based on the conservation of mass:

m_sugar + m_water = 120 g (Equation 1)

We also know that after evaporation, the mass of the dry residue is 16 g, which consists only of sugar. Therefore, we can write:

m_sugar = 16 g (Equation 2)

To find the mass of water in the solution, we can subtract the mass of sugar from the total mass of the solution:

m_water = 120 g - 16 g = 104 g

Now, let's calculate the mass fraction of sugar in the initial solution.

The mass fraction of sugar is defined as the ratio of the mass of sugar to the total mass of the solution:

Mass fraction of sugar = (m_sugar / (m_sugar + m_water)) * 100%

Substituting the values we found earlier:

Mass fraction of sugar = (16 g / (16 g + 104 g)) * 100%

Calculating this expression gives us the mass fraction of sugar in the initial solution.

Please note that the provided search results did not provide any relevant information for this specific calculation. However, the solution provided above is based on the given information and the principles of conservation of mass.

The mass fraction of sugar in the initial solution is approximately 13.33%.

Calculation of the Mass of Water in the Solution

To calculate the mass of water in the solution, we can use the equation we derived earlier:

m_water = 120 g - 16 g = 104 g

Therefore, the mass of water in the solution is 104 g.

I hope this helps! Let me know if you have any further questions.