Ions

Question 1

which ions do acids release in solution?

Answer 1

h+ (hydrogen)

Question 2

which ions do alkalis release in solution?

Answer 2

OH- (hydroxide)

Question 3

what is the ph of an acid solution solution

Answer 3

ph0-6

Question 4

what is the ph of an alkaline solution

Answer 4

ph 8-14

Question 5

an acid with ph 3 is diluted by a factor of 10. new ph?

Answer 5

pH 4

Question 6

predict the colour of universal indicator in a strong alkaline solution

Answer 6

dark blue or purple

Question 7

what does litmus turn in alkalis

Answer 7

blue

Question 8

what colour change happens in phenolphthalein as it goes from acid to alkaline

Answer 8

colourless to pink

Question 9

what does methyl orange in an acid?

Answer 9

red

Question 10

how is concentrated acid different to a dilute acid

Answer 10

more acid is dissolved per dm3

Question 11

describe strong acid

Answer 11

an acid that is completely dissociated into a solution

Question 12

give an example of a strong acid

Answer 12

hydrochloric acid

Question 13

describe a weak acid

Answer 13

an acid that partially dissociates in solution

Question 14

formula for sulphuric acid

Answer 14

H2SO4

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 a 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 which is always soluble

Answer 19

sodium

Question 20

what is a precipitate

Answer 20

an insoluble salt formed when solutions are mixed together