Question

What is the total number of moles of H2 S o4 required to prepare 5 litre of 2 M solution

Answer 1

gTo find:

• No. of moles req to prepare 5 litre of 2 M H₂So₄ solution

Solution:

• Molar mass of H₂SO₄ = 98 g/mol.
• So 1 mole contains 98 gm of H₂SO₄
• We need 5 litres of 2 molar solution.
• That means that in each litre we need 2 moles of H₂SO₄.
• We need 5 litres of such a solution.
• Weight of H₂SO₄ required = 98 g * 5 litre * 2 mol/litre
• Weight of H₂SO₄ required = 980 grams.
• That is we need 980 gms of H₂SO₄ or 10 moles of H₂SO₄.

Answer:

We need 10 moles of H₂SO₄ to prepare 5 litres of 2 M solution.