Sugar – Cooking fruit with or without sugar solution

fruitsugar

Why does fruit retain its shape when heated in sugared water but break down when heated with just plain water?

Best Answer

It is a case of osmotic pressure. If you heat it in plain water, the sugars inside the cell want to cross the cell membrane and try to equalize their concentration inside and out. With sugar in the water, the osmotic pressure is already equal so they don't need to leave the fruit.