4.74 gm of CuO when heated with current of H2 gave 3.78 gm of metal.Find the Equivalent mass of Cu?

1 Answer
Ernest Z.
Jun 4, 2018

The equivalent mass of "Cu"Cu is 32 g.

Step 1. Calculate the mass of "O"O in the "CuO"CuO

"Mass of O = (4.74 - 3.78) g = 0.96 g"Mass of O = (4.74 - 3.78) g = 0.96 g

Step 2. Calculate the equivalent mass of the copper

The equivalent mass of a substance is the mass that will react with 8 g of oxygen.

"Equivalent mass" = 8 color(red)(cancel(color(black)("g O"))) × ("3.78 g Cu")/(0.96 color(red)(cancel(color(black)("g O")))) = "32 g Cu"

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