Answer to Question #153872 in Chemistry for Sabrina Ahmed

Question

Determine the limiting reactant.

info given:

Ba(OH)2 volume-50.0 mL and molarity-1.000 M.

HCl(aq) volume-50.00 mL and molarity-1.000 M.

Initial temperature: 20 degrees celsius   Final temperature: 26.81 degrees celsius

Answer 1

The balanced reaction equation is:

Ba(OH)₂ + 2HCl $\rightarrow$ BaCl₂ + 2H₂O.

As it can be seen from the stoichiometric coefficients, 1 molecule of Ba(OH)₂ reacts with 2 molecules of HCl. Therefore, one needs two times more HCl than Ba(OH)₂.

In the equal volumes of the solutions with the equal concentrations, the equal number of the moles of the solute is contained:

$n = cV$.

Therefore, the limiting reactant is HCl, as its quantity is equal to the one of Ba(OH)₂ but twice as much is needed.

Answer: according to the information given, HCl is the limiting reactant.