Chemistry [ Aqueous Solutions - Nuclear Chemistry]

Question 1

Non-electrolyte

Answer 1

do not conduct electricity

Question 2

Weak Electrolyte

Answer 2

weak conductors of electricity

Question 3

Strong electrolyte

Answer 3

good conductors

Question 4

Precipitate

Answer 4

insoluble substance which is produced from a chemical reaction

Question 5

Rule for Solubility

Answer 5

Polar solutes dissolve in polar solvents

Question 6

percent by mass

Answer 6

(mass of component/mass of solution) x100%

Question 7

percent by volume

Answer 7

(Volume of component/volume of solution) x100%

Question 8

parts per million

Answer 8

(mass of component/mass of solution) x10^6

Question 9

parts per billion

Answer 9

(mass of component/mass of solution) x10^9

Question 10

Mole Fraction (x)

Answer 10

(total moles of all components)

Question 11

Molarity (M)

Answer 11

total volume of solution, L

Question 12

Molality (m)

Answer 12

    mass in kg solvent

Question 13

Normality (N)

Answer 13

total volume of solution, L

Question 14

Thermochemistry

Answer 14

study of heat changes between the system and the surroundings

Question 15

Law of Conversation of Energy

Answer 15

energy released is always equal to the energy absorbed

Question 16

Enthalpy of reaction

Answer 16

Heat associated in a chemical reaction

kilojoules (kj)

Question 17

Endothermic

Answer 17

absorb energy

Question 18

Exothermic

Answer 18

release energy

Question 19

1 cal

Answer 19

4.1864

Question 20

R=

Answer 20

.0821 L-atm/ K-mol

Question 21

Equilibrium State

Answer 21

achieved when a large amount of products are formed which now pushes the reaction to go into the reverse direction

the formation of the products is equal to the formation of the initial reactants

Question 22

La Chatelier’s Principle

Answer 22

any equilibrium that is subjected to stress will shift to a direction that will relieve the stress

Question 23

Chemical Kinetics

Answer 23

study of the rate of chemical reactions

Question 24

Activation Energy

Answer 24

amount of energy required for a reaction to occur

Question 25

Higher Activation Energy

Answer 25

slower reaction

Question 26

Factors Affecting the Rate of Reaction

Answer 26

1. nature of reactant 2. temperature 3. presence of catalyst 4. concentration

Question 27

Radioactive Decay

Answer 27

Alpha Beta Positron Gamma

Question 28

Alpha

Answer 28

- 4 atomic mass | lose two neutrons and two protons

Question 29

Beta

Answer 29

lose one proton and gain one neutron

Question 30

Positron

Answer 30

lose one neutron and gain one proton

Question 31

Gamma

Answer 31

gain nothing, nothing happens