140 grams of lithium react with water. How many grams of hydrogen are released and how many grams of alkali are formed?
| May 5, 2021 | education
Lithium react with water.
2Li + 2H2O = 2LiOH + H2.
Let’s calculate the number of moles of substances taking into account the stoichiometric coefficients.
n (Li) = n • Mr = 140/2 • 7 = 10 mol.
n (LiOH) = n (Li) = 10 mol.
n (H2) = n (Li) / 2 = 10/2 = 5 mol.
The mass of the reaction products is.
m (LiOH) = n • Mr = 10 • 24 = 240 g.
m (H2) = n • Mr = 5 • 2 = 10 g.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
