Question

Железо массой 6г прореагировало с избытком хлора. Полученный хлорид растворили в воде массой 200 г. Вычислите массовую долю соли в полученном растворе

Answer 1

2Fe+3Cl2=2FeCl3
2моль      2 моль
0,1моль  0,1 моль

ν(ню)(Fe)=6/56=0,1моль
m(FeCl3)=ν*M=0,1*162,5=16,25
m(раствора)=200+16,25=216,25
W(FeCl3)=16,25/216,25=0,0751  (7,51%)

Answer 2

Calculation of the Mass Fraction of Salt in the Solution

To calculate the mass fraction of salt in the solution, we need to determine the mass of the salt and the total mass of the solution.

Given information: - Mass of iron (Fe) = 6 g - Excess chlorine (Cl) reacted with iron to form iron chloride (FeClx) - The iron chloride was dissolved in water with a mass of 200 g

To calculate the mass fraction of salt, we need to find the mass of the salt and the total mass of the solution.

Mass of the Salt (FeClx)

To find the mass of the salt (FeClx), we need to determine the molar ratio between iron (Fe) and chlorine (Cl) in the reaction. The balanced chemical equation for the reaction between iron and chlorine is:

Fe + Cl2 → FeClx

From the equation, we can see that 1 mole of iron reacts with x moles of chlorine to form 1 mole of iron chloride. To find the value of x, we need to know the valency of iron in the iron chloride compound. Unfortunately, the valency of iron in the iron chloride compound is not provided in the given information or search results.

Without the valency of iron, we cannot determine the exact molar ratio between iron and chlorine, and therefore, we cannot calculate the mass of the salt (FeClx) accurately.

Total Mass of the Solution

The total mass of the solution is given as 200 g.

Conclusion

Without the valency of iron in the iron chloride compound, we cannot accurately calculate the mass fraction of salt in the solution. The valency of iron is needed to determine the molar ratio between iron and chlorine, which is essential for calculating the mass of the salt.