Experiment 1

Question 1

Combination Reactions

Answer 1

Involves two or more elements or molecules coming together to produce a new molecule.

Question 2

Decomposition Reactions

Answer 2

When a molecule is broken down to form smaller molecules or elements. Often initiated by heat or light.

Question 3

Displacement Reactions

Answer 3

Involve an exchange of components between molecules or atoms.

Question 4

Single Displacement

Answer 4

Involves the exchange of one component.

Question 5

Double Displacement

Answer 5

Exchanges two components.

Question 6

Neutralization

Answer 6

When an acid and a base react to form a salt and water.

Question 7

% Yield

Answer 7

(Actual Yield/Theoretical Yield) x 100%

Question 8

% Atom Economy

Answer 8

(Molar Mass of Desired Product/Molar Masses of All Reactants) x 100%

Question 9

Reaction 1

Answer 9

Cu (s) —> Cu(NO3)2 (aq). Add 15.8 M HNO3 (aq). End solution is blue.

Question 10

Reaction 2

Answer 10

Cu(NO3)2 (aq) —> Cu(OH)2 (aq). Add DI H2O and NaOH (aq). End solution is opaque, teal colour mixture.

Question 11

Reaction 3

Answer 11

Cu(OH)2 (aq) —> CuO (s). Heat mixture until black. Vacuum filter.

Question 12

Gelatinous

Answer 12

Thick.

Question 13

Bumping

Answer 13

Bubbling and boiling.

Question 14

Coagulate

Answer 14

To thicken.

Question 15

Filtrate

Answer 15

The liquid that is filtered off (the liquid in the flask).

Question 16

Reaction 4

Answer 16

CuO (s) —> CuSO4 (aq). Add 3 M H2SO4 (aq). End solution is blue.

Question 17

Reaction 5

Answer 17

CuSO4 (aq) —> Cu (s). Add Zn to displace copper. Add 6 M HCl to fully remove the Zn.

Question 18

Decant

Answer 18

To pour off excess liquid.

Question 19

Supernatant Solution

Answer 19

The liquid on top of a solid.