acids and bases

Question 1

properties of bases

Answer 1

• turns litmus paper blue
• are caustic and slippery
• taste bitter
• react with acids
• have a ph of 7+
• conduct electricity

Question 2

properties of acids

Answer 2

• turns litmus paper red
• corrosive
• sour
• react with bases
• have a pH of less than 7
• conduct electricity

Question 3

arhenius definition of acids

Answer 3

a substance that ionises in water to produce a hydrogen ion or proton

Question 4

arrhenius definition of a base

Answer 4

substances that dissociates in water to form hydroxide ions

Question 5

what is a strong acid/base

Answer 5

does not mean concentrated acid/base

an acid that can ionise completely in water

use single arrow to represent strong base/acid

Question 6

what is a weak acid/base

Answer 6

substances that do not fully ionise in water

we use double arrows to represent this

Question 7

strong acids

Answer 7

hcl
hno3
hso4

Question 8

strong bases

Answer 8

naoh
koh
ba(oh)2

Question 9

weak acids

Answer 9

ch3cooh
h2co3
h3po4

Question 10

weak bases

Answer 10

nh3
ch2nh2

Question 11

limitations of arrhenius model

Answer 11

does explain how substances without h or oh form acidic solutions when dissolved in water as they have no H atoms

Question 12

bronsted lowry model

Answer 12

shows how substances without h or oh produce hydrogen or hydroxide ions by reacting with water in a process called hydrolosis

acids are proton donors
bases are proton acceptors