7.18 g iron displaces 2.04 g copper from copper sulphate solution. If the equivalent weight of copper is 31.7, calculate the equivalent weight of iron.

7.18 g iron displaces 2.04 g copper from copper sulphate solution. If

1.	7.18 g iron displaces 2.04 g copper from copper sulphate solution. If the equivalent weight of copper is 31.7, calculate the equivalent weight of iron.
Answer» Solution :In the present case, MASS of IRON taken = 1.8 g Mass of copper displaced = 2.04 g Equivalent mass of copper = 31.7 Using the relation `=("Mass of iron")/("Mass of copper") = ("Equivalent weight of iron")/("Equivalent weight of copper") ` and substituting the VALUES, we have `1.8/2.04 = ("Equivalent weight of iron")/31.7` or Equivalent weight of iron `=(1.8 XX 31.7)/2.04= 27.97`