1. goldentigers.org #28 Copper Retrieval Lab Part I: Separating Copper (II) oxide (CuO) Chemistry

2. goldentigers.org Copper Retrieval Lab – Part 1 TA Setup 6 Bins, per bin ­ 2 (72 cups total)cups with 2-3g of CuO (barely cover bottom) ­ 2 - 100 ml beakers of 40 ml 1M HCL (900 ml dionized water + 100 ml 12M HCL) ­ 4 empty 50 ml beakers ­ 2 thermometers ­ 2 funnels ­ 2 clay triangles ­ Filter papers (2 large, 2 small) color coded and labeled by period, group, and lab pair (e.g. B2 1AC) ­ Distilled water bottle

3. goldentigers.org Dec 7(B) & Dec 8(A) Big Idea: Show Me the Money! Objective: SWBAT retrieve Cu from CuO Do Now: Read, annotate, answer questions Agenda: ­ Do Now10 min ­ Group Leader/Greeter ­ Homework & Do Now Review05 min ­ CRS Clicker Practice20 min ­ Copper Retrieval Lab – Part I30 min Homework: Complete table on worksheet #27 Growth Quiz #4 & Retakes of #3 Wednesday

4. goldentigers.org CRS Clicker Practice

5. goldentigers.org 1) In Study 2, as the atomic mass decreases, the % of elements that are metalloids: SIN 503 A. Decreases B. Increases C. Decreases then increases D. Increases then decreases 30

6. goldentigers.org 2) One way Study 2 differed from Study 1 was that in Study 2 the students: IOD 506 A. Did not count the # metalloids within a range of atomic masses B. Studied more metalloids C. Studied more metals & metalloids D. Studied a broader range of atomic masses 30

7. goldentigers.org 3) According to percentages in Study 1, which of the following statements is true? IOD 502 A. Metalloids are more likely at lower atomic masses B. Metalloids are most likely when atomic mass is 50 - 200 C. Metalloids never occur if atomic mass is greater than 200 D. Metalloids are least likely when atomic mass is negative 30

8. goldentigers.org 4) Why did they change the way the atomic mass was recorded between Study 1 and Study 2? SIN 502 A. They noticed that in Table 1 the # metalloids with atomic mass >200 g/mol was few B. They noticed that most metalloids had an atomic mass of 50-200 g/mol, and wanted to look more specifically at that range C. With few metalloids with atomic mass <50 g/mol, they assumed this was significant D. They wanted data that would better help them detect Germanium 30

9. goldentigers.org 5) Which study would necessitate determining the atomic mass for nonmetals? SIN 502 A. Study 1 B. Study 2 C. Both Study 1 and Study 2 D. Neither Study 1 nor Study 2 30

10. goldentigers.org 30 Second Stretch Clear tables of everything, except: ­ Today’s worksheet ­ Pencil

11. goldentigers.org Background Metals are often found in minerals, combined with other elements that have to be processed to retrieve the copper If you want to make a coin, how can you retrieve pure copper from these minerals? Table 2.6 Copper Oxide CuO

12. goldentigers.org Background In our first copper lab, we heated copper powder and formed copper oxide (as it turned black): Cu + O 2 → CuO We will be trying to retrieve the pure copper again, in two steps ­ Today (Part I): retrieving unreacted copper and converting CuO into CuCl 2 ­ Next class (Part II): converting CuCl 2 into Cu

13. goldentigers.org Purpose (Write Down) Retrieve as much copper (Cu) as possible from copper oxide (CuO) using: CuO + HCl → CuCl 2 + H 2 O (To think about) How is copper retrieved from copper containing minerals?

14. goldentigers.org What’s New Review: Decanting (NOT filtering) Rinsing out tilted beaker thru filter

15. goldentigers.org Safety First! What do we do before we start a lab? Put on aprons and goggles! How long do we keep them on? Until after lab cleanup! What don’t we do? Talk to other groups SPECIAL SAFETY NOTES Hydrochloric acid (HCl) burns skin. Today’s solution is 10x stronger than the last time we used it. Thermometers can tip over the beakers if left alone Rinse off thermometer before returning it to bin Save decanted HCl liquid! Pour out filtered water Fold filter label inside (so it’s visible when unfolded); don’t cover label with copper or beaker on shelf