We write down the equation of a chemical reaction:
2 Al + 6HCl = 2AlCl3 + 3H2;
It can be seen from the equation that 2 moles of aluminum react with 6 moles of hydrochloric acid. Provided that aluminum is 0.1 mol, that is, 20 times less (2 / 0.1 = 20), then hydrochloric acid will be required 20 times less.
6/20 = 0.3 mole.
You can solve the problem in another way. The ratio in the reaction of the number of moles of aluminum and hydrochloric acid is 2/6 or 1/3. This means that the number of moles of acid should be 3 times more than moles of aluminum.
0.1 * 3 = 0.3 mole.
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.