12 g of magnesium was reacted with hydrochloric acid. Calculate the amount of hydrogen evolved.
February 11, 2021 | education
| Magnesium interacts with hydrochloric acid. In this case, magnesium chloride is synthesized and hydrogen gas is released. This reaction is described by the following chemical reaction equation:
Mg + 2HCl = MgCl2 + H2;
In accordance with the coefficients of the equation, upon dissolution of 1 mol of magnesium, 1 mol of gaseous hydrogen is released.
Let’s calculate the chemical amount of magnesium. To do this, divide the available weight of the metal by the weight of 1 mole of metal.
M Mg = 24 grams / mol;
N Mg = 12/24 = 0.5 mol;
The same amount of hydrogen will be synthesized.
Let’s calculate its volume, for this we multiply the amount of substance by the volume of 1 mole of gas (22.4 liters):
V H2 = 0.5 x 22.4 = 11.2 liters;
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