Topic 3

Question 1

acid

Answer 1

ph under 7
releases hydrogen ions h+ in water
concentration h ion=ph decrrases

Question 2

base

Answer 2

substance that reacts with an acid to nake it neutral
produces a salt and wster

Question 3

alkali

Answer 3

ph more than 7
a soluble base
form hydroxide oh ions in water

Question 4

litmus

Answer 4

acid-red
neutral-purple
alkali-blue

Question 5

methyl organge

Answer 5

acid-red
neutral-yellow
alkali-yellow

Question 6

phenolphthalein

Answer 6

acid-colourless
neutral-colourless
alkali-pink

Question 7

neutralistaion practical

Answer 7

1.volume of dilute hydrochloric acid into flask
2.meassure calcium oxide using balance
3.add calcuim oxide ro hydrochloric acid
4.wait for base to react then record ph
5.repeat steps 2 n 4 when unreacted calcuim oxide sitting at bottom of flask

Question 8

acids ionise

Answer 8

splitting up produce to a hydrogen ipn and another one

Question 9

strong acids

Answer 9

ionise almost completely in water

Question 10

weak acids

Answer 10

dont fully ipnise in solution

Question 11

which acid is a reversable teaction which sets up equilibrium

Answer 11

weak

Question 12

what gappens when concentration of h+ ions increases by a factor 10

Answer 12

ph decreases by 1

Question 13

acid + metal oxide

Answer 13

salt + water

Question 14

acid + metal hydroxide

Answer 14

salt + water

Question 15

acid + metal

Answer 15

salt+ hydrogen

Question 16

acid + metal carbonate

Answer 16

salt+water+carbon dioxide

Question 17

how does a salt form when 2 solutions mixed

Answer 17

precipitate

Question 18

sodium,potassium,ammonium

Answer 18

soluble

Question 19

nitrates

Answer 19

soluble

Question 20

common chlorides

Answer 20

soluble (except silver wnd lead chloride)

Question 21

sulfates

Answer 21

soluble (excepy lead bariym and calcuim sulfate)

Question 22

carbonates and hydroxides

Answer 22

insoluble

Question 23

making insoluble salys
lrevipitation reactions

Answer 23

1.1 spatch of lead nitrate to tube
2.add water to diolve it
3.shake
4.do the same w sofium chloride in another tube
5.2 solution is beaker and stir->lead chloride lreciptatse out
5.folded filter paper into filter funnel and stick funnel into conical flask
6.pour beaker in dilter paper
7.

Question 24

electrolysis

Answer 24

breaking down substance using electricitu

Question 25

oxidation

Answer 25

loss of elctrons

Question 26

reduction

Answer 26

gain of electrons

Question 27

positive ipns

Answer 27

cations

Question 28

negative ions

Answer 28

cathode