Study Guide For IPS
Post Lab- Reaction in a bag
- Phenol Red
- Used as a Ph indicator
- Below 7 turns yellow
- above 8 turns pink
Solid A
- Calcium chloride a
- Acidic
- Hydrotropic (Attracted to water)
Uses: Canned veggies (keeps from getting mushy)
electrolytes( Sports drinks)
Solid B
- Sodium bicarbonate (baking soda)
- not acidic
- Uses:
- Baking
- Cat litter
- tooth paste
- laundry detergent
Heating Baking Soda Post Lab
Control group- unheated test tube
Expreimental group: heated test tube
indicator- tea ( Showed difference in color)
variables- some thing you want to measure
independent variable- Cause and effect
Dependent variable: color of tea
Control factor- things you can control
Expreimental Errors
1. Hole in tubing- gas will not push water out
2. Not clean stirring rod at beginning- contaminates
3. Stoper not snug- gas leakes out
Extra Questions
Is the amount of condensation that forms at the top of the heated test tube more or less than the amount of baking soda being heated?
Less- Condensation comes from baking soda
Box Questions
3. 50 cm (cubed)
4. Box A has a greater width and hight so it can make up for length
5. 7 cm (cubed)
6. a- 8
b- 27
c- 216
7. Box B
8. As the surface increases, depth decreases
9. a- 1.3, 3.8
10. .1 cm (cubed)
11. a- 4.0 cm (cubed)
b. 1.30 cm (cubed)
12. 12: Rounded up from 11.5 and rounded down from 12.4
12.0: rounded down from 11.95-12.04
12.00 cm (cubed) 11.995- 12.004
13. Lines are further apart because there is les surface so that equals more depth makes it easier to read
Volume Notes
- Volume= 1x W x H
- Standard unit of lengt= meter
- 1 centimeter = .01 meter
Volume of Liquids
- use graduated cylinder to measure volume
* Always check the intervals or scale
- Units+ milliters (mL) or cm (cubed)
- 1 mL is 1 Centimeter
- Read from bottom of meniscus
Saftey
Balance Notes
2. Always "zero balance before each massing
- push all riders to zero
- Use adjustment nob if needed
3. Never switch pans
4. Pick up balance red bar only
5. Don't zero balance when done