As temperature rises, solid generally become more soluble in water, but gases become less soluble. If soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down? 1. Sugar may precipitate out. 2. Gas bubbles may form and produce foam. 3. Water may evaporate rapidly.
The answer is 1. However, commercial soft drinks do not contain so much sugar that they would precipitate out at the freezing point temperature.
To answer this question, we need to understand the solubility of sugar and carbon dioxide in water under different temperature conditions.
1. Solubility of Sugar: The solubility of sugar generally increases with temperature. Therefore, if a soft drink containing high concentrations of sugar is cooled down, it is more likely that the solubility of sugar will decrease. As a result, the sugar may precipitate out of the solution, leading to the formation of a sugar deposit or sediment at the bottom of the drink.
2. Solubility of Carbon Dioxide (Gas): The solubility of gases, including carbon dioxide, generally decreases with temperature. Therefore, if a carbonated soft drink containing carbon dioxide gas is cooled down, the solubility of carbon dioxide will decrease. As a result, gas bubbles may form and escape from the solution, leading to the production of foam or fizzing when the drink is opened or poured.
3. Water Evaporation: The cooling process itself doesn't directly cause water to evaporate rapidly. However, if the soft drink is left open or exposed to air while being cooled down, the temperature difference between the drink and the surrounding environment could potentially facilitate water evaporation. This process may cause a slight decrease in the overall volume of the drink.
In summary, when a soft drink containing high concentrations of sugar and carbon dioxide is cooled down, sugar precipitation, gas bubble formation, and potential water evaporation are the expected outcomes. Keep in mind that the extent of these phenomena can be influenced by factors such as initial concentration, cooling rate, and exposure to air.