Question

A student carries out an inquiry involving the dissolution of sugar in water at different temperatures. The student prepares four cups, each containing 100 mL of water that has been heated to distinct temperatures. Subsequently, she adds 10 grams of granulated sugar to each cup. After allowing time for the sugar to dissolve, she notes the duration it takes for dissolution in each cup. The image presents her findings. The image is of a 4 thermometer in 4 different cups of water. The thermometer is in one of the cups for 4 seconds and 72 on the thermometer. Another one of the thermometer is in one of the cups for 2 seconds and is at 95. Another one of the thermometer's is in the cup for 7 seconds and is at 45. The last thermometer was in the cup for 5 seconds and is at 65. Which conclusion can be drawn from the results?

Answer 1

Based on the information provided, it appears that the times taken for the sugar to dissolve vary with the temperature of the water. Here's a breakdown of the results from the four cups:

1. Cup 1: Temperature at 72°C - Sugar dissolved in 4 seconds.
2. Cup 2: Temperature at 95°C - Sugar dissolved in 2 seconds.
3. Cup 3: Temperature at 45°C - Sugar dissolved in 7 seconds.
4. Cup 4: Temperature at 65°C - Sugar dissolved in 5 seconds.

From this, we can draw the following conclusions:

• Higher temperatures of the water (as seen in Cup 2 with 95°C) lead to faster dissolution of sugar (only 2 seconds).
• Lower temperatures (Cup 3 at 45°C) result in longer dissolution times (7 seconds).
• The general trend suggests that increased temperature increases the solubility of sugar in water, resulting in quicker dissolution.

Overall, the conclusion that can be drawn is that an increase in temperature of the water leads to a decrease in the time required for sugar to dissolve. This illustrates the principle that solubility often increases with temperature for many solutes.