# Study Guide For IPS

## Post Lab- Reaction in a bag

Red Liquid

- 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

#7. They are not the same substance becaus ethe heated test tube is a different color than the unheated test tube

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

1. It releases a gas when heated which helps dough rise

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

- Unit of measurement is cm (cubed)

- 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

Refer back to study guide Mr. Leeds gave us.

## Balance Notes

1.Check that pan is clean and dry

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