Question

Calculate the mass, in grams, of Na₂SO₃ required to prepare exactly 100 mL of a 0.760-M solution of Na₂SO₃.

Answer 1

We know one formula to solve this type of problems easily. That in- Requined - Moderulan we Mars - 2. = Moleculan Weight x Required Molarity x Required Volume in L Given - mofe * L Required Molanity = 0.760 M = 0.760 – Molecular weight of Naqs O₂ = 126 g/mole Required volume = 100 mb = 1000 L = 0.1L 1000 *As we know, Molanity means moles pen Liten.

od Volume in L .. Required - Molecular weight & Required Molarity & Masa - of Na₂SO3 Required = 126 x 0.760 meter x 0.4+ = 9.576 g :. The required Mans of Na₂SO3 is 9.576 g. An.