contestada

in the reaction mgcl2+2koh mg(oh)2 +2kci IF 1 MOLE MGCL2 IS added to 3 moles koh what is the limiting reagent

Respuesta :

For 1 mole of MgCl2, it would require 2 moles of KOH. ( 1 : 2 mole ratio) 

Since you have 3 moles of KOH, it is in excess, and MgCl2 is the limiting reactant.

Answer: [tex]MgCl_2[/tex]

Explanation:

[tex]MgCl_2+2KOH\rightarrow Mg(OH)_2+2KCl[/tex]

According to stoichiometry,

1 mole of [tex]MgCl_2[/tex] reacts with 2 moles of [tex]KOH[/tex]

Thus when 1 mole of [tex]MgCl_2[/tex] is added to 3 moles of [tex]KOH[/tex] , (3-2)moles= 1 mole of [tex]KOH[/tex] will remain unused.

Thus [tex]MgCl_2[/tex] is the limiting reagent as it decides the formation of products.

[tex]KOH[/tex] is excess reagent as it remains unused.