Question

Запутался и уже не понимаю. Прорешал, но не пойму как найти массу раствора(Fe2(SO)3), он необходим для вычисления массовой доли. Железо массой 8,4 г прокалили с водяным паром, весь металл полностью прореагировал в ходе реакции. Полученный твердый продукт отделили и поместили в 160 г 40%-ного раствора серной кислоты. Вычислите массовую долю соли трёхвалентного железа в растворе, образовавшемся после окончания второй реакции.

Answer 1

Ответ + пояснение:

Масса конечного раствора — всё, что смешали минус осадки и газы. По условию задачи смешали оксид железа с раствором серной кислоты. Количество вещества оксида железа можно найти по его молям. (моли ищи по реакции 1)

Answer 2

Calculation of the Mass of the Solution (Fe2(SO)3)

To find the mass of the solution (Fe2(SO)3), we need to consider the reactions that took place and the given information.

1. Reaction 1: Iron (Fe) reacts with water (H2O) to form iron(III) oxide (Fe2O3) and hydrogen gas (H2).

The balanced equation for this reaction is: 2 Fe + 3 H2O -> Fe2O3 + 3 H2

Given information: - Mass of iron (Fe) = 8.4 g

To find the mass of iron(III) oxide (Fe2O3) formed, we need to calculate the molar mass of Fe2O3 and use stoichiometry.

The molar mass of Fe2O3 is calculated as follows: Molar mass of Fe = 55.845 g/mol Molar mass of O = 15.999 g/mol

Molar mass of Fe2O3 = (2 * Molar mass of Fe) + (3 * Molar mass of O) = (2 * 55.845 g/mol) + (3 * 15.999 g/mol) = 159.69 g/mol

Now, we can calculate the moles of Fe2O3 formed using the given mass of iron (Fe): Moles of Fe2O3 = Mass of Fe / Molar mass of Fe2O3 = 8.4 g / 159.69 g/mol

Please note that the molar mass of Fe2(SO)3 is not provided in the given information. Therefore, we cannot directly calculate the mass of the solution (Fe2(SO)3) without additional information.

2. Reaction 2: The solid product obtained from Reaction 1 is reacted with a 40% solution of sulfuric acid (H2SO4).

Given information: - Mass of the 40% sulfuric acid solution = 160 g

To calculate the mass fraction of the trivalent iron salt (Fe2(SO)3) in the solution, we need to consider the stoichiometry of the reaction and the molar mass of Fe2(SO)3.

However, the molar mass of Fe2(SO)3 is not provided in the given information. Without the molar mass of Fe2(SO)3, we cannot directly calculate the mass fraction of the trivalent iron salt in the solution.

In summary, without the molar mass of Fe2(SO)3, we cannot calculate the mass of the solution (Fe2(SO)3) or the mass fraction of the trivalent iron salt in the solution. Additional information is needed to proceed with the calculations.

If you have any further questions, please let me know!