2. How much copper is in the used copper chloride solution?
Nov 26 / Act B24
Diluting the Problem
LEARNING TARGET: I can conduct an dilution experiments in order to understand and determine its viability as a disposal method for solutions containing copper.
CH Q
How much copper is in the used copper chloride solution?
VOCAB:
Next slide

3. Parts per million (ppm) serial dilution
Concentration
Control
Dilution
Indicator
Parts per million (ppm)
serial dilution
how much compared to total; strength of a substance
no change for comparison
reducing concentration; Making weaker
chemical used to show change
how many in one million units
consistent steps reducing concentration

4. -Have collected as hazardous waste - -Dilute until safe ppm level -
DISCUSSION
What should we do with our used copper chloride solution from last class?
-Dump down drain -
-Have collected as hazardous waste -
-Dilute until safe ppm level -
-Collect / Reclaim metal - NO
POSSIBLY
YES
YES
What is meant when a concentration is expressed as ‘parts per million’ ?
how many in one million
show TED video and bottle

5. How can you make the solution in the 2nd cup more dilute?
DISCUSSION 1 2 3 4
What is the concentration of the solution in the nd cup to 1st cup? -- more, less or the same as - 2nd cup to 3rd cup? -- more, less or the same as
How can you make the solution in the 2nd cup more dilute?

6. PROCEDURE AND DATA
MATERIALS:
PROCEDURE: Read on pg. B and summarize
DATA: WS Determining Concentration
WS Treating Waste
WS Diluting Used Copper Chloride Solution

7. Expected Results
should be cup 9

9. ANALYSIS
- Discuss and answer Q 2-6 on pg. B- 63
ANS CHALLENGE Q
How much copper is in the used copper chloride solution? A:
about 100,000 ppm
HOMEWORK
1. Catch up on journal; Finish AQs