Question

0.796 gm of metal oxide when heated with current of dry H2 , 0.18 gm of H2O was found.he equivalent mass of metal?

Answer 1

The equivalent mass of the metal is 32 g.

Explanation:

Step 1. Calculate the mass of `"O"` in the water

`"Mass of O" = 0.18 color(red)(cancel(color(black)("g H"_2"O"))) × ("16.00 g O")/(18.02 color(red)(cancel(color(black)("g H"_2"O")))) = "0.160 g O"`

Step 2. Calculate the mass of metal in the oxide

`"Mass of M = (0.796 - 0.160) g = 0.636 g"`

Step 3. Calculate the equivalent mass of the metal

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

`"Equivalent mass" = 8.00 color(red)(cancel(color(black)("g O"))) × ("0.636 g M")/(0.160 color(red)(cancel(color(black)("g O")))) = "32 g M"`