acid and alkali

Question 1

which ions do acids release

Answer 1

hydrogen ions h+

Question 2

which ions do alkalis release

Answer 2

hydroxide OH-

Question 3

ph of an acidic solution

Answer 3

0-6

Question 4

ph of an alkali solution

Answer 4

8-14

Question 5

an acid with a ph of 3 is diluted by a factor of 10 what’s the new ph

Answer 5

4

Question 6

predict the colour of a strong alkaline solution

Answer 6

dark blue or purple

Question 7

what colour does limitus turn an alkali

Answer 7

blue

Question 8

What colour change happens in phenolphthalein as it goes from acidic to alkaline?

Answer 8

Colourless to pink

Question 9

what colour is methyl orange in acid

Answer 9

red

Question 10

formula of sulphuric acid

Answer 10

H2SO4

Question 11

how is a concentrated acid different to a diluted acid

Answer 11

more acid is dissolved per dm3

Question 12

describe a strong acid

Answer 12

an acid that completely dissociates in a solution

Question 13

an example of a strong acid

Answer 13

hydrochloric acid

Question 14

describe a weak acid

Answer 14

partially dissociates in a solution

Question 15

what is an alkali

Answer 15

a base which is soluble in water

Question 16

which products form when an acid reacts with metal

Answer 16

salt+ hydrogen

Question 17

which products form when an acid reacts with a metal oxide or hydroxide

Answer 17

salt+ water

Question 18

which products form when an acid reacts with a metal carbonate

Answer 18

salt+water +carbon dioxide

Question 19

name a type of salt that is always soluble

Answer 19

sodium

Question 20

what is a precipitate

Answer 20

An insoluble salt formed when solutions are mixed together