Answer :

To determine the amount of sugar that will saturate 100 mL of water at 40°C, we need to reference the known solubility data for sugar at that temperature.

A solution is said to be saturated when no more solute can dissolve in the solvent at a given temperature. For sugar (sucrose), this saturation point changes with temperature.

At 40°C, the maximum amount of sugar that can dissolve in 100 mL of water, which leads to the formation of a saturated solution, is one of the given answer choices. Let's evaluate the options provided:

A) 45 grams
B) 100 grams
C) 175 grams
D) 250 grams

Since the solubility of sugar in water at 40°C is well-documented, we compare each of these choices against the known data:

- 45 grams of sugar in 100 mL of water at 40°C is too low, as sugar's solubility at this temperature is much higher.
- 100 grams of sugar dissolved in 100 mL of water at 40°C is still below the saturation point.
- 175 grams of sugar in 100 mL of water at 40°C is the correct answer, as it matches the solubility data.
- 250 grams of sugar is more than what can dissolve in 100 mL of water at 40°C, and thus incorrect.

Therefore, the correct amount of sugar that will saturate 100 mL of water at 40°C is:

C) 175 grams

So, the answer is:

175 grams of sugar will saturate 100 mL of water at 40°C.