Acids and Alkalis

Question 1

what are 2 properties of Acids

Answer 1

have a PH of less than 7
source of H+ ions

Question 2

what are 2 properties of Alkalis

Answer 2

have a PH of greater than 7
source of OH- ions

Question 3

what colour does a strong acid go in universal indicator

Answer 3

red

Question 4

what colour does a strong alkali go in universal indicator

Answer 4

blue

Question 5

what are 2 other indicators

Answer 5

litmus paper
phenolphthalein
Methyl orange

Question 6

how does litmus show if a substance is alkaline or acidic

Answer 6

red - if acid
blue - if alkaline

Question 7

how does phenolphthalein show if a substance is alkaline or acidic?

Answer 7

colourless if acid
pink if alkaline

Question 8

how does methyl orange show if a substance is alkaline or acidic?

Answer 8

red - if acid
yellow - if alkali

Question 9

what are 2 factors that affect the PH of an acid

Answer 9

concentration
dissociation rate

Question 10

what is the dissociation rate

Answer 10

how readily the acid releases its H+ ions

Question 11

Ph increases by 1 when the H9 ion concentration decreases by a factor of…

Answer 11

10

Question 12

What is a base

Answer 12

`any substance that with an acid to from salt and water only

Question 13

base + acid –>

Answer 13

salt + water

Question 14

NaOH + HCL –>

Answer 14

NaCl + H20

Question 15

what is the formula for nitric acid

Answer 15

HN03

Question 16

what is the formula for sulfuric acid

Answer 16

H2SO4

Question 17

metal + acid –>

Answer 17

salt + hydrogen

Question 18

MG + HCL –>

Answer 18

MgCl + H2

Question 19

metal carbonate + acid –>

Answer 19

salt + water + carbon dioxide

Question 20

CaCO3 + HCl –>

Answer 20

CaCl + H2O + CO2

Question 21

what is neutralisation

Answer 21

the reaction between an acid and an alkali to create a neutral solution where the H+ and OH- ions react to create water