How much will the hydrogen produced by the action of sodium take on 138 g of ethyl alcohol?

1. Let’s write down the reaction equation:

2Na + 2C2H5OH = 2C2H5ONa + H2.

2. Find the amount of ethyl alcohol:

n (C2H5OH) = m (C2H5OH) / M (C2H5OH) = 138 g / 46 g / mol = 3 mol.

3. Using the reaction equation, we find the amount of hydrogen:

n (H2) = 0.5n (C2H5OH) = 0.5 * 3 mol = 1.5 mol.

4. Find the volume of hydrogen (Vm – molar volume, constant equal to 22.4 mol / l):

V (H2) = n (H2) * Vm = 1.5 mol * 22.4 mol / L = 33.6 L.

Answer: V (H2) = 33.6 liters.