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Solved: Here is an after-dinner trick. With guests still
Chapter 12, Problem 140P(choose chapter or problem)
Here is an after-dinner trick. With guests still sitting at the table, the host provided each of them with a glass of water containing an ice cube floating on top and a piece of string about 2–3 in. in length. He then asked them to find a way to lift the ice cube without touching it by hand or using any other objects such as a spoon or fork. Explain how this task can be accomplished. (Hint: The table had not been cleared so the salt and pepper shakers were still there.)
Questions & Answers
QUESTION:
Here is an after-dinner trick. With guests still sitting at the table, the host provided each of them with a glass of water containing an ice cube floating on top and a piece of string about 2–3 in. in length. He then asked them to find a way to lift the ice cube without touching it by hand or using any other objects such as a spoon or fork. Explain how this task can be accomplished. (Hint: The table had not been cleared so the salt and pepper shakers were still there.)
ANSWER:Step 1 of 3
Colligative properties
Properties of a solvent that are affected by the presence of a solute are called colligative properties. These properties depend only on the amount of the solute present in the solvent and not on the identity of the solute. This means that any solute produces the same effect in a solvent if the concentration of the solute particles in the solution is the same.
Lowering of the vapor pressure of the solvent, elevation in boiling point, depression in freezing point are some of the examples of colligative properties.
Due to these effects, the physical properties of a solution differ from the solvent it is made from.