ch6 alchemy lab

Alchemy Lab Name_____________________pd________

Purpose: Turn a ‘base metal’, copper into silver, then into gold without using a ‘philosopher stone’ Watch this video if you missed.

Procedure:

1. Draw a flow chart as the procedure as described by the instructor.

2. Follow safety precautions! Dangers include: dust, heat and chemical burns !

3. Answer the conclusion questions; you will need p 802-804 (r18-21 etext) of your text

Conclusions:

1. What did you observe?

2. Is the ‘silver’ coin elemental silver? Is the ‘gold’ coin elemental gold? Explain.

3. What is this ‘gold made of? What is the real name of this ‘gold’? What is the general name for mixtures of metals? Why are mixtures of metal made?

4. What type of bonding is present? What are the outer electrons doing?

5. What compound did the HCl remove? What would happen if the penny was heated too much? Which has a lower melting pt, Cu or Zn? How can you tell from the lab?

6. For what commercial reason is this mixture of metals made? Other mixtures of metals include the following. For each, name the elements they are made of , what their advantage is over pure elements, and a use.

a. bronze

b. solder

c. dental amalgams

d. stainless steel

7. Why is this lab called an ‘alchemy lab’? What is a ‘base metal’? What is a ‘philosopher stone’?

8. what kind of bonds in the methane burning reaction?