The solubility of sugar is 204 g/ 100 g water at 20 °C. How many grams of water are needed to dissolve 612 grams of sugar at the same temperature?

Question

250 g

400 g

300 g

350 g

Answer 1

Treat solubility as a conversion factor. Start with what you know, 612 g of sugar and cancel units in order to get the g of water...

612 g sugar (100 g water / 204 g sugar) = g of water

Yes, it is surprising that you can dissolve twice as much sugar by mass as there is water!

Take care.