Question

0.2 gram of mg is completely dissolved in dilute H2 S o4 and 185 ml of dry hydrogen gas was collected at ntp calculate Equivalent weight of mg​

Answer 1

Answer:

The equivalent weight of mg is 24.22 grams.

Explanation:

Step 1 : Calculate the moles of Hydrogen gas evolved.

Molar gas volume at ntp = 22.4 Liters.

This means :

1 mole of a gas = 22400 milliliters.

We can calculate the number of moles in 185 milliliters.

Moles of hydrogen = 185/22400 = 0.008259 moles.

Step 2 : Calculate the equivalent weight of mg.

Equivalent weight = mass of mg/moles of hydrogen.

Equivalent = 0.2/0.008259 = 24.22 grams

The equivalent weight of Mg 24.22 grams.