Question

!!срочно!! К 550 грамм 34%-ного раствора ортофосфорной кислоты добавили 250 граммов воды. расчитай массовую долю растворенного вещества в образовавшемся растворе.

Answer 1

Ответ:

550 делим на 250 умножаем на сто получим омегу (массовую долю ) вещества = 220%

Answer 2

Calculating the Mass Fraction of the Solute in the Solution

To calculate the mass fraction of the solute in the resulting solution, we can use the following formula:

Mass Fraction = (mass of solute) / (total mass of solution)

Given: - Mass of the 34% orthophosphoric acid solution = 550 grams - Mass of water added = 250 grams

First, let's calculate the mass of the solute (orthophosphoric acid) in the original solution.

Mass of Solute in the Original Solution The mass of the solute in the original solution can be calculated using the percentage concentration of the solution.

Mass of Solute = (percentage concentration / 100) * (total mass of solution)

Mass of Solute = (34 / 100) * 550 grams Mass of Solute = 0.34 * 550 grams Mass of Solute = 187 grams

Now, let's calculate the total mass of the resulting solution after adding water.

Total Mass of Resulting Solution The total mass of the resulting solution is the sum of the mass of the original solution and the mass of water added.

Total Mass of Solution = Mass of Solute + Mass of Water Total Mass of Solution = 187 grams + 250 grams Total Mass of Solution = 437 grams

Now, we can calculate the mass fraction of the solute in the resulting solution.

Mass Fraction of Solute in Resulting Solution Using the formula: Mass Fraction = (mass of solute) / (total mass of solution)

Mass Fraction = 187 grams / 437 grams Mass Fraction ≈ 0.428

So, the mass fraction of the solute (orthophosphoric acid) in the resulting solution is approximately 42.8%.