To determine the largest mass of copper sulphate that can be dissolved in 50 grams of water at 60 degrees Celsius, we need to know the solubility of copper sulphate at that temperature. The solubility of copper sulphate in water increases as the temperature increases. According to solubility data, the solubility of copper sulphate at 60 degrees Celsius is approximately 204 grams per 100 grams of water.

To calculate the largest mass of copper sulphate that can be dissolved in 50 grams of water at 60 degrees Celsius, we can use the following proportion:

(Mass of copper sulphate / Mass of water) = Solubility

Let x be the mass of copper sulphate we want to find:

x / 50 grams = 204 grams / 100 grams

Solving for x, we get:

x = (204 grams / 100 grams) * 50 grams

x ≈ 102 grams

Therefore, the largest mass of copper sulphate which can be dissolved in 50 grams of water at 60 degrees is approximately 102 grams.