What volume of hydrogen is formed by the interaction of 7 g of iron with hydrochloric acid?
| August 22, 2021 | education
First, write down the reaction equation.
Fe + 2HCl = FeCl2 + H2.
Determine the amount of iron substance, apply the following formula.
n = m / M.
Where n is the amount of substance.
m is the mass of the substance.
M is the molar mass of the substance.
M (Fe) = 56 g / mol.
n (Fe) = 7 g / 56 g / mol = 0.125 mol.
Next, use the reaction equation to determine the amount of hydrogen.
0.125 mol Fe – x mol H2.
1 mol Fe – 1 mol H2.
Determine the unknown value of x.
X = 0.125 mol * 1 mol: 1 = 0.125 mol.
Therefore, the amount of hydrogen substance is 0.125 mol.
Determine the volume of hydrogen.
V = n * Vm.
Vm is the molar volume, constant 22.4 L / mol.
V = 0.125 mol * 22.4 L / mol = 2.8 L.
Therefore, the volume of hydrogen is 2.8 liters.
Answer: V (H2) = 2.8 liters.
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