Question

HCl+Fe=? Расставить коэффициенты методом электронного баланса.

Answer 1

Fe + 2HCl(разб.) = FeCl2 + H2↑

Восстановление:
2H+ + 2e− = H2
Окисление:
Fe − 2e− = Fe2+ 
2H+ + Fe = H2 + Fe2+ 

уравниваем:

2H+ = H2 

Answer 2

Balancing the Equation: HCl + Fe = ?

To balance the equation HCl + Fe = ?, we need to ensure that the number of atoms on both sides of the equation is equal. We can balance the equation using the method of electron balance.

The balanced equation is: 2HCl + Fe = FeCl2 + H2.

Here's how we balance the equation:

1. Start by counting the number of atoms on each side of the equation: - Left side: 1 hydrogen (H) atom, 1 chlorine (Cl) atom, and 1 iron (Fe) atom. - Right side: 2 chlorine (Cl) atoms, 1 iron (Fe) atom, and 2 hydrogen (H) atoms.

2. Balance the hydrogen (H) atoms by adding a coefficient of 2 in front of HCl on the left side: - Left side: 2 hydrogen (H) atoms, 1 chlorine (Cl) atom, and 1 iron (Fe) atom. - Right side: 2 chlorine (Cl) atoms, 1 iron (Fe) atom, and 2 hydrogen (H) atoms.

3. Balance the chlorine (Cl) atoms by adding a coefficient of 2 in front of FeCl2 on the right side: - Left side: 2 hydrogen (H) atoms, 1 chlorine (Cl) atom, and 1 iron (Fe) atom. - Right side: 4 chlorine (Cl) atoms, 1 iron (Fe) atom, and 2 hydrogen (H) atoms.

4. The equation is now balanced with 2HCl + Fe = FeCl2 + H2.

Please note that the coefficients in front of the formulas represent the number of molecules or moles of each substance involved in the reaction.