metals and acids/reacting with o2 and water

Question 1

description of metals

Answer 1

metals
high mp and bp
sonorous-metal sounds
malleable-flexible/able to bend in shapes
good conductors of heat and electricty/-easily allows energy to transfer thr it poor insulators tho
shiny when new/fresh
strong
ductile-easy to stretch

Question 2

decription of non-metals

Answer 2

dull colours and appearance
non-sonorous
non-malleable
bad conductors of heat and electricity/poor insulators
non ductile

Question 3

what happens when a metal reacts with an acid-

Answer 3

effervescence-bubbles of gas
sparks
colour change
temperature change-exothermic or endothermic
change in state
any new substance formed
smell

Question 4

exothermic and endothermic mean?

Answer 4

exothermic-gives out energy
endothermic-gives in energy

Question 5

write the following as a symbol form:
hydrochloric acid
nitric acid
sulphuric acid

Answer 5

hydrochloric acid- HCL-disolves iron,smells and colourless
nitric acid- H2SOL- colourless and poisonous
sulphuric acid-HNO3- violently corrosive

Question 6

metal + acid=

Answer 6

salt plus hydrogen

Question 7

the salt you get when metal and acid reacts depends on what?

Answer 7

it depends on the acid and metal you have used

Question 8

the salt you get when metal and acid reacts depends on what?

Answer 8

it depends on the acid and metal you have used

Question 9

nitric acid will make

Answer 9

nitrate

Question 10

sulphuric acid will make

Answer 10

sulphate

Question 11

hydrochloric acid will make

Answer 11

chloride

Question 12

how do you know hydrogen is produced duirng a metal and acid reaction?

Answer 12

pour 10 ml of hydrochloric acid in tube
add your metal then cover
once you see the formattion of bubbels put a splint of fire in a pop splint should occur
shows hydrogen is created as its flammable-catches fire easily
bubbles produced are hydrogen gas made as acids have properties of H+ ions

Question 13

define oxidising

Answer 13

combining chemically with oxygen

Question 14

another word for salt:

Answer 14

sodium chloride

Question 15

how can we use the reactions of metals with oxygen to determine the reactivity of metals?

Answer 15

put water in a tube w the metal and see which one changes colour more
weigh them

Question 16

what is the only metal that conducts electricty?

Answer 16

carbon

Question 17

when iron,oxygen and water react what it the product?

Answer 17

iron hyrdoxide which when present results into rusting-corrosion

Question 18

define catalyst-

Answer 18

a catalyst is a substance that changes the speed of a reaction without being permanently changed itself

Question 19

examples of a catalyst:

Answer 19

hair curler,straightner,cars

Question 20

what metal doesnt react with water or oxygen is

Answer 20

platinum

Question 21

metals more ereactive than potassium

Answer 21

caesium and rubidium

Question 22

what metal reacts with oxygen but not water

Answer 22

copper

Question 23

which metals reacts slowly with water

Answer 23

tin,iron and zinc

Question 24

why doesnt alluminium rust?

Answer 24

when its first fresh it reacts w oxygn and has an oxide layer on it prevent it

Question 25

difference between metals rusting and corroding?

Answer 25

Corrosion is the process by which certain materials, metals and non-metals, deteriorate as a result of oxidation.
Rusting is oxidation of iron in the presence of air and moisture.

Question 26

which metal is the only one that can rust?

Answer 26

iron

Question 27

displacemnet reaction-

Answer 27

when during the reaction the more reactive metal gradually disappears as it forms a solution and the less reactive metal coats the surface of the more reacting metal

Question 28

example of displacemnet reaction

Answer 28

zinc + iron oxide = zinc oxide + iron
this is because zinc is more reactive than iron