Question

Mrs. Hill put 50g of sugar in water and watched the sugar dissolve. She then boiled the sugar water in a pan until it evaporated, and the sugar was left at the bottom of the pan. How much sugar was left?

Answer 1

The process of dissolving and then evaporating water does not change the mass of the sugar. Therefore, after the water has evaporated, 50g of sugar would be left, the same amount that was originally used.

Step-by-step explanation:

The question asks about what happens when sugar is dissolved in water and then the water is evaporated. When Mrs. Hill put 50g of sugar in water and observed it dissolving, she made a solution where sugar was the solute and water acted as the solvent. After evaporating the water by boiling, there would be 50g of sugar left. This is because the process of dissolving sugar in water and subsequently evaporating the water does not change the mass of the sugar; it only changes the state from solid to solution and back to solid.