LEC MOD 4

Question 1

who proposed arrhenius acid and base?

Answer 1

Svante august arrhenius

Question 2

components of arrhenius acid

Answer 2

hydrogen containing compound

produces hydrogen ions in aque sols

Question 3

components of arrhenius base

Answer 3

hydroxide containing compound

produces hydroxide ions

Question 4

who proposed bronsted lowry acid and base?

Answer 4

Johannes Nicolaus Bronsted

Thomas martin lowry

Question 5

acid and base based on activity

Answer 5

BL acid and base

Question 6

acid and base based from species produced

Answer 6

Arrhenius acid and base

Question 7

species formed when a proton is added to a BL base; previous base

Answer 7

Conjugate acid

Question 8

species that remains when a proton is removed from a BL acid; previous acid

Answer 8

Conjugate base

Question 9

this substances can function either as BL acids or bases

Answer 9

Amphiprotic substances

Question 10

supplies one proton per molecule during as acid base reaction

Answer 10

Monoprotic Acid

ex, HCl

Question 11

supplies two protons per molecule during an acid-base reaction

Answer 11

Diprotic acid

Ex. H2CO3

Question 12

supplies three protons per molecule during an acid-base reaction

Answer 12

Triprotic Acid

ex. H3PO4

Question 13

characteristics of Acids

Answer 13

taste sour
have pH lower than 7
affect indicators
react with active metals and produce H2
react with carbonates
neutralize bases

Question 14

characteristics of bases

Answer 14

taste bitter
hyave slippery feel
have pH higher than 7
affect indicators giving colors opposite to acids
neutralize acids

Question 15

a scale of small numbers used to specify molar hydronium concentration in an aqueous solution

Answer 15

pH scale

Question 16

defined as the negative logarithm of an aqueous solution’s molar hydronium ion concentration

Answer 16

pH

Question 17

formula for pH

Answer 17

-log(H3O=)

Question 18

formula for hydronium concentration

Answer 18

[H3O=] = 1.0 x 10^-pH

antilog(-pH)

Question 19

relationship of hydronium ion and pH level?

Answer 19

Inversely proportional

Question 20

relationship of hydroxide ions and pH level?

Answer 20

Directly proportional

Question 21

ionic compound which contains a metal or polyatomic ion + or; nonmetal or polyatomic ion -

Answer 21

Salt

Question 22

salts can be formed from a reaction between:

Answer 22

Acid + base= neutralization

Base + Non-metal oxide

Question 23

they prevent major changes in the pH of a solution

Answer 23

Buffer

Question 24

components of Buffer

Answer 24

weak acid and conjugate base

Question 25

buffer of blood

Answer 25

H2CO3 carbonic acid
HCO3 bicarbonate
buffer system

Question 26

standard pH level of blood

Answer 26

7.35-7.45.-

Question 27

what does pKa mean?

Answer 27

ionization constant of the weak acid

Question 28

henderson hasselbalch equation

Answer 28

pH= pKa + log[CB/WA]

Question 29

describes the relationship of pH and pKa

Answer 29

Henderson Hasselbalch equation