O is greater than that from the sugar solution, while the condensation rates are the same. The external pressure on the water will become equal to the vapor pressure of the water, causing it to boil. OR The drop in external pressure causes the boiling point to drop to the temperature of the water. No reaction occurs with silver. Zinc is a better reducing agent or a more active metal than copper and will be oxidized.
Silver is a less reactive metal than copper is.
Placment of I 2 must be correctly indicated for second point. To earn credit, the student must connect the equation to the issue to be explained. O y species with correct diagram earns one point. The addition of a solute lowers the freezing point of water. Therefore, CaCl 2 is more effective.