Question

Пластинка из железа массой 10,4 г. опустили в раствор хлорида меди (2).вычислите массу образовавшейся соли

Answer 1

Fe+CuCl2=FeCl2+Cu n(Fe)=m/M=10.4/56=0.19 моль Подставляем в реакцию Сверху над железом 0.19 Снизу под железом 1 Над FeCl2-x Под FeCl2 1 Получаем пропорцию 0.19/1=х/1 Решая пропорцию мы нашли химическое количество FeCl2 оно составляет 0.19моль Теперь найдем массу FeCl2=n*M=0.19*127=24.14

Answer 2

Calculation of the Mass of the Formed Salt

To calculate the mass of the salt formed when a 10.4 g iron plate is immersed in a copper chloride (CuCl2) solution, we need to determine the chemical reaction that occurs between iron and copper chloride.

The balanced chemical equation for the reaction between iron (Fe) and copper chloride (CuCl2) is:

Fe + CuCl2 → FeCl2 + Cu

According to the equation, one mole of iron reacts with one mole of copper chloride to produce one mole of iron chloride and one mole of copper.

To calculate the mass of the formed salt (iron chloride, FeCl2), we need to determine the molar mass of FeCl2 and then use the molar ratio between FeCl2 and Fe.

The molar mass of FeCl2 can be calculated by adding the atomic masses of iron (Fe) and chlorine (Cl):

FeCl2 = (1 * atomic mass of Fe) + (2 * atomic mass of Cl)

Using the atomic masses from the periodic table, we find:

FeCl2 = (1 * 55.845 g/mol) + (2 * 35.453 g/mol) = 126.742 g/mol

Now, we can calculate the moles of FeCl2 formed by dividing the mass of the iron plate by the molar mass of FeCl2:

moles of FeCl2 = mass of iron plate / molar mass of FeCl2

moles of FeCl2 = 10.4 g / 126.742 g/mol

Calculating this, we find:

moles of FeCl2 ≈ 0.082 moles

Since the molar ratio between FeCl2 and Fe is 1:1, the moles of FeCl2 formed are equal to the moles of Fe reacted.

Finally, we can calculate the mass of the formed salt (FeCl2) by multiplying the moles of FeCl2 by its molar mass:

mass of FeCl2 = moles of FeCl2 * molar mass of FeCl2

mass of FeCl2 = 0.082 moles * 126.742 g/mol

Calculating this, we find:

mass of FeCl2 ≈ 10.38 g

Therefore, the mass of the formed salt (FeCl2) is approximately 10.38 grams.

Please note that the above calculation assumes that the reaction goes to completion and there are no other side reactions or losses during the process.