Chemistry Unit 18-28

Question 1

indicators of a chemical reaction:

Answer 1

change in color, formation of bubbles, heat, precipitate (solid formed from two liquids)

Question 2

reactant + reactant

Answer 2

—>products + products

Question 3

Dilution is:

Answer 3

concentration of substance lowered by adding another substance (water)

Question 4

What does 1000 ppm mean?

Answer 4

1000/1,000,000

Question 5

Why is ammonia used to test for copper?

Answer 5

Changes blue/green/teal with any amounts of copper in substance (even small amounts of copper that can not be seen by the eye)

Question 6

Reduce production of waste

Answer 6

buy less, use recycled materials, buy materials made from recycled products

Question 7

What are the chemical properties of substances?

Answer 7

Occur during or after a chemical reaction–bubbles, color change, heat, precipitate

Question 8

3 ways to get rid of waste

Answer 8

Dilution, Incineration, & Metal Reclamation

Question 9

Equation categories

Answer 9

Synthesis, Decomposition, Single replacement, Double replacement

Question 10

Incineration is

Answer 10

: burning of a substance at a temperature higher than 650 degrees F and infused oxygen