Unit 1. Section A Summary HW Problems Pt. 1

#1:

a. Physical

b. Chemical

c. Chemical

d. Physical

#2:

a. Physical

b. Physical

c. Chemical

d. Physical

#3:

a. Chemical

b. Physical

c. Chemical

d. Physical

#4:

a. Chemical

b. Chemical

c. Physical

d. Physical

#5:

a. "Left out in the air" implies that the oxygen reacted with the other chemical compounds of the apple slices (chemical).

b. "After extended use" means that the reactions in the flashlight were continuous while turned on (chemical).

c. The dry cleaning materials are removing the oils rather than using a chemical reaction to change them (physical).

d. Nothing reacted with the salad dressing, it was just left out and deteriorated on its own (physical).

Predictions:
1- Paper stays the same 
2- Paper turns to ash
3- Universal indicator turns blue or purple w/ ammonia and red or orangey with the vinegar
4- Chemical changes when mixed
5- Will become powder
6- Powder will melt
7- Wax will melt from heat
8- wax around wick will melt
9- chemicals will change from baking soda and vinegar combined
10- chemicals will react when combined
11- chemicals combine and react
12- different objects will measure different volumes
13- nail will turn blue due to chemical change