2. Sept 17 / 18 Act A6 Identifying Liquids
LEARNING TARGET: I can investigate and determine different liquids in a specific mixture.
CHALLENGE Q
What are the liquids in the mixture?
VOCAB
chemical properties physical properties
Miscible toxic observation
how they react
how they "appear"
poison
"mixable"
To see or notice

3. Miscible (water or alcohol) Contains Water Corrosive Toxic Flammable
DISCUSSION
Review and define each of the following terms. Predict how to test each (if testable).
Appearance
Miscible (water or alcohol)
Contains Water
Corrosive
Toxic
Flammable
Which of the liquids do you think will be flammable?
Why do you think this? Demo to follow

4. Appearance – State of matter (S,L,G); transparency; thickness
DISCUSSION (cont)
Appearance – State of matter (S,L,G); transparency; thickness
Miscible (water or alcohol) – Does it mix? Or remain a separate layer?
Contains Water – blue Cobalt Chloride strip will turn pink if substance contains water

5. Flammable – if flammable, liquid will ignite or spark
DISCUSSION (cont)
Corrosive (liquids) – Measuring pH levels; Yes ‘corrosive’ if pH is highly acidic (less than 3) OR highly basic (more than 11)
Toxic – harmful to health of organisms; adding potassium thiocyanate to liquid, if turns RED, liquid is toxic
Flammable – if flammable, liquid will ignite or spark

6. DEMO:
Predict: Which of the liquids, (A - clear or B - orange) will be flammable? Why?

7. ONLY ONE CAP OFF A BOTTLE AT ONE TIME and DROP THROUGH THE AIR !
PROCEDURE AND DATA
MATERIALS:
PROCEDURE: Read on pg. A-22-24, and summarize
DATA: WS 6.1 Properties of Separated Liquids
update WS 5.1 with new data

8. vials
ethanol
vials
ethanol
BLUE
test strip

9. add
TAN
test
strip
potassium…
dropper bottle
When finished: Use table 2 on pg A-25 to identify the liquids in the mixture

10. ANALYZE RESULTS BELOW TO IDENTIFY LIQUID A and LIQUID B

11. ANALYSIS - Separate Sheet of paper – Turn in
Independently answer Q 1 on pg. A-24
Use: WS 6.1 Properties of Separated Liquids & Table 2 on pg. A-25 & Claim-Evidence-Reasoning
Make a Claim (A statement or conclusion that answers the original question/problem)
Giving 3 pieces of Supporting Evidence (Scientific data that supports the claim)
Explain Your Reasoning (A justification that connects the evidence to the claim)

12. ANALYSIS
Discuss and answer Q 2 & 3 on pg. A-24
ANS CHALLENGE Q
What are the liquids in the mixture? A:
the mixture's liquids are:
A = mineral oil
B = iron nitrate
HOMEWORK
Finish Analysis Questions (Use SEPUP website to find questions if needed)