what is the total number of moles of electrons needed to completely reduce 6 moles of Ni2+ (aq) ions?

Question

given the reaction;
Mg(s)+Ni2+(aq)--->Mg2+(aq)+Ni(s)

please explain i dont understand how ur suppose to do this and i have a regents comming up!

please explain i dont understand how ur suppose to do this and i have a regent comming up!

Answer 1

Twelve. Each nickel ion takes two electrons, and there are six moles of nickel, so twelve moles of electrons.

Answer 2

To reduce 1 ion Ni2+, you need two electrons for 1mole of ions you need two moles of electrons and for 6 moles of Ni2+, you need 2*6=12 moles of electrons