Pre-Lab Questions Name 1. Everyday Dr. Bork brings his mug of coffee (actually i

Question

Pre-Lab Questions Name 1. Everyday Dr. Bork brings his mug of coffee (actually it is often just water). When I make coffee, I pour boiling water over my grounds and collect whatever comes out on the other side. Which separation techniques did I utilize to make my delicious beverage? 2. I drink my coffee without adding sugar or milk. Is my drink a mixture or a pure substance? Why? 3. What is sublimation? How does it fundamentally differ from evaporation? 4. Of the separation techniques explained in the lab introduction which of them (if any) are chemical changes? How do you know?

Explanation / Answer

1) filtration is used. The fine particles come song with water whereas the bigger ones are filtered out.

2) even then, it is a mixture since it contains a solution of water with coffee in it.

3) sublimation is direct conversion of a solid to gas whereas evaporation isa state change from liquid to gas.

4) data should be provided which all techniques were introduced in the lab.

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