Question

In the laboratory you dissolve 18.5 g of nickel(II) bromide in a volumetric flask and add water to a total volume of 125 . mL.  

What is the molarity of the solution?    M

Answer 1

$M(NiBr_2)=59+2x35=129 g/mol$

$n(NiBr_2)=18.5/129=0.143 mol$

$c(NiBr_2)=0.143/0.125=1.15 mol/l$