Answer :
A mass of 48.5 g of a certain substance can be dissolved in 29.1 ml of water at 20° C, the solubility of this substance is 1.67 g.
We know that, Density of water = 1 g / mL
= 29.1 mL x 1 g
= 29.1 g water
Solubility = (Mass of solute / Mass of solvent) × 100
= ( 48.5 g / 29.1 g ) × 100
= 167 g
Here, Solubility of substance is 167 g per 100 gm of water
So, 167 × 1 / 100 = 1.67 g of the substance can be dissolved per gram of water.
Thus, 1.67 g of the substance can be dissolved per gram of water.
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