Calculate the number of equivalents in each.

Question

1.) 40g of Mg^ 2

2.) 16g of Al^ 3

Answer 1

Atomic weights: Mg=24  Al=27

1.) 40gMg x 1molMg/24gMg x 2eqwtMg/1molMg = 3.3 eq wt Mg

2.) 16gAl x 1molAl/27gAl x 3eqwtAl/1molAl = 1.8 eq wt Al

Both answers to two significant figures