Answer:
Step-by-step explanation:
(A) We know that Molarity=[tex]\frac{moles solute}{litres solution}[/tex]
Since, moles solute= 0.0345 and litres solution =400mL=0.400l, thus
Molarity=[tex]\frac{3.45{\times}10^-2}{0.400}[/tex]
=[tex]8.62{\times}10^{-2}[/tex]
=[tex]0.0862M[/tex]
(B) Moles solute=Molarity×litres solution
=2.20×0.0350
=0.077 moles
(C) Using the formula,
Litres solution=[tex]\frac{moles of solute}{molarity}[/tex]
=[tex]\frac{0.125}{1.50}[/tex]
=0.0833L=83.33mL
