What mass of hydrogen chloride was formed by the action of concentrated sulfuric
| January 12, 2021 | education
What mass of hydrogen chloride was formed by the action of concentrated sulfuric acid on the crystalline salt of NaCl weighing 58 g when heated?
H2SO4 + 2NaCl = Na2SO4 + 2HCl.
1) Find the molar mass of sodium chloride according to the periodic table: 23 + 35.5 = 58.5.
2) Find the amount of sodium chloride substance. For this, the mass of the chloride is divided by its molar mass: 58 / 58.5 = 0.99 mol.
3) According to the reaction equation, there are two moles of hydrochloric acid for two moles of sodium chloride. This means that the amount of hydrochloric acid substance is 0.99 mol.
4) The molar mass of hydrochloric acid: 1 + 35.5 = 36.5.
5) Mass of hydrochloric acid: 0.99 * 36.5 = 36.135 g – answer.
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