Unit 9

Question 1

what measures acidity

Answer 1

indicator strip

Question 2

how many levels of pH

Answer 2

15, 0-14

Question 3

Arrhenius definition of acids

Answer 3

acid is a substance that produces H+ ions when dissolved in water, and it dissociates into anions

Question 4

Arrhenius definition of bases

Answer 4

base is substance that produces OH- (hydroxide) ions when dissolved in water, and dissociates into cations

Question 5

Bronsted-Lowry definition of acid

Answer 5

substance that donates H+

Question 6

Bronsted-Lowry definition of base

Answer 6

substance that accepts H+

Question 7

water is an amphoteric substance in that it can

Answer 7

act either as an acid or a base

Question 8

conjugate bases and acids(reactants)

Answer 8

A conjugate acid is formed when a proton is added to a base, and a conjugate base is formed when a proton is removed from an acid.

Question 9

relationship of hydronium to hydroxide in an acidic solution

Answer 9

[H3O+] > [OH-]

Question 10

relationship of hydronium to hydroxide in a neutral solution

Answer 10

[H3O+] = [OH-]

Question 11

relationship of hydronium to hydroxide in a basic solution

Answer 11

[H3O+] < [OH-]

Question 12

Equilibrium constant for water at 25 degrees Celsius

Answer 12

Kw = [H3O+][OH-] = 1.0 x 10^-14

Question 13

pH

Answer 13

potential for hydrogen, measuring the concentration of hydronium(or H+) in a solution,

Question 14

logarithmic scale

Answer 14

pH = -log[H3O+]

Question 15

as pH increases by 1 level, the scale factor of [H3O+] decreases by

Answer 15

10

Question 16

How to convert concentration of Hydronium to the concentration of hydroxide

Answer 16

pH=14-pOH

Question 17

dissociation constant of a base or acid

Answer 17

Ka=[CHO2-][H3O+]/[HCHO2] only aqueous or gaseous substances

Question 18

if Ka is large

Answer 18

acid or base is strong

Question 19

if Ka is small

Answer 19

acid or base is weak