Unit D: Chemical Equilibrium + Acid/Base Systems Module 8

Question 1

Kw equation

Answer 1

Kw= (H3O(aq))(OH-(aq))

Question 2

Bronsted Lowry Acid Base Theory

Answer 2

an acid is a proton donor, a base is a proton acceptor

Question 3

Amphiprotic Substance

Answer 3

substance that can either donate or accept a proton

Question 4

Equilibrium Position when acid is above base

Answer 4

products are favoured

Question 5

Equilibrium Position when base is above acid

Answer 5

reactants are favoured

Question 6

Ka

Answer 6

indicates how much the acid has ionized

Question 7

KA Value Rule of Thumb

Answer 7

if the initial concentration of acid is at least 1000x its Ka value then its assumed the initial concentration is equal to the equilibrium concentration

(drop the x in the denominator

Question 8

Kb

Answer 8

the extent that bases react to produce hydroxide ions

Question 9

Equivalence Point + pH’s

Answer 9

when chemically equal amounts of reactants have been combined

strong acid + strong base pH of 7

Strong acid + weak base pH lower then 7

weak acid + strong base pH higher then 7

Question 10

Polyprotic Substance

Answer 10

substance that can donate or accept more then one proton

Question 11

Endpoint

Answer 11

when an acid base indicator changes colour

Question 12

Buffer Solution

Answer 12

weak acid + same amount of its conjugate base