What mass of #"nickel(II) chloride hexahydrate"# is present in a #250*mL# volume of #1.00*mol*L^-1# concentration?

1 Answer
Jan 8, 2018

Answer:

By definition, #"molarity"="moles of solute"/"volume of solution"#...we require a mass of approx. #75*g#

Explanation:

Here you specify a #"molarity"=1.00*mol*L^-1# with respect to #Ni(NO_3)_2*6H_2O# and a volume of #250*mL-=0.250*L#...

And so we require a molar quantity of....

#"moles of solute"="molarity"xx"volume"#

And note that the given product has units of #mol*L^-1xxL-="moles"# as required....

And so .........

#"moles of nickel salt hydrate"=1.00*mol*L^-1xx0.250*L=0.250*mol#

And to get the mass we take the product....

#0.250*molxxunderbrace(290.79*g*mol^-1)_"molar mass of metal hydrate"=??*g#