Exam 4

Question 1

1 mole =

Answer 1

(Avogadro’s number) 6.022 x 10²³

Question 2

Empirical formula

Answer 2

The simplest ratio of atoms in a chemical formula

Question 3

Electrolyte

Answer 3

Ions dissolved in water

Question 4

Non-electrolyte

Answer 4

Molecules in water

Question 5

Strong electrolytes

Answer 5

Solute is completely ionized (only ions)

Question 6

Weak electrolytes

Answer 6

Only some of the solute ionizes (some ions and some molecules)

Question 7

Molarity (M)

Answer 7

Concentration
mol/L (moles/liters)

Question 8

Dilution formula

Answer 8

M₁V₁ = M₂V₂

Question 9

Precipitation reaction

Answer 9

Two (aq) reactants produce a solid + (aq)

Question 10

Combustion reaction

Answer 10

Byproducts = CO₂ + H₂O

Question 11

Acid-base (neutralization) reaction

Answer 11

Byproducts = a salt + H₂O(g)
also has a lot of H in equation

Question 12

Oxidation-reduction (redox) reaction

Answer 12

Change in oxidation state

Question 13

Decomposition reaction

Answer 13

1 reactant goes to multiple products

Question 14

Spectator ion

Answer 14

An ion that does not take part in the chemical reaction. Found in the solution before and after the reaction.

Question 15

Oxidation state

Answer 15

Pretty much the same as charge

Question 16

OILRIG

Answer 16

Oxidation is loss Reduction is gain (of electrons)

Question 17

A substance in its elemental state (O₂,H₂,F₂) has an oxidation number of

Answer 17

0 (always)

Question 18

O oxidation state

Answer 18

Almost always -2

Question 19

F oxidation state

Answer 19

Always -1

Question 20

H oxidation state

Answer 20

most of the time +1, sometimes -1

Question 21

Solute

Answer 21

The substance dissolved in the solvent

Question 22

Solvent

Answer 22

Major component of the solution (water)

Question 23

Solution

Answer 23

Homogeneous mixture of two or more substances

Question 24

Solubility

Answer 24

How much of a substance dissolves in the solvent