metals and the reactivity series

Question 1

describe reaction of metals with dilute acids

Answer 1

metal+ acid -> salt + hydrogen

Question 2

sulfuric acid symbol + salt
hydrochloric acid symbol +salt
nitric acid symbol + salt

Answer 2

H2SO4 metal sulfate
HCL metal chloride
HNO3. metal nitrate

Question 3

what is the test for hydrogen

Answer 3

lit splint squeeky pop

Question 4

what happens when either copper, silver or gold react with dilute acid

Answer 4

no reaction, would only react with more concentrated acids, because these are less reactive metals

Question 5

what happens when potassium or sodium reacts with an acid

Answer 5

violent, explosive,

Question 6

what happens when calcium or magnesium reacts with an acid

Answer 6

bubbles, rapid reaction, exothermic

Question 7

what happens when aluminium reacts with an acid

Answer 7

at first slow reaction becuse of its oxide layer, but once its been stripped off reaction is fast produces bubbles

Question 8

what happens when zinc or iron react with an acid

Answer 8

slow/steady reaction, few bubbles

Question 9

what happens when a metal reacts with oxygen

Answer 9

produces the metal oxide

Question 10

what happens when potassium reacts with oxygen

Answer 10

metal goes from shiny dark silver to a dull white/ blue solid

Question 11

what happens when iron wool reacts with oxygen

Answer 11

iron goes from shiny light grey to a dull dark brown solid, produce shiny sparks

Question 12

what hapens when magnesium reacts with oxygen

Answer 12

goes from shiny light grey to a dull white solid produces bright white light

Question 13

what happens when a metal reacts with water

Answer 13

produces metal hydroxide and hydrogen

Question 14

what metals cant react with cold or hot water

Answer 14

gold copper silver zinc alumnium

Question 15

what metals cant react with steam

Answer 15

gold copper silver

Question 16

what happens when iron reacts with water

Answer 16

rusts slowly

Question 17

what happens when calcium reacts with water

Answer 17

reacts rapidly hydrogen gas given off water turns milky white

Question 18

what happens when magnesium reacts with water

Answer 18

slow reaction

Question 19

what happens when sodium reacts with water

Answer 19

rapid reaction, sodium floats in water abd moves rapidly heat from reaction melts sodium

Question 20

what happens when potassium reacts with water

Answer 20

violent reaction, floats on surface of water and melts and then caches fire lilac flame produced

Question 21

what are some uses for aluminium and why?

Answer 21

manufacture of aircraft because low density
manufacture of overhead electrical cables becuse low density and good electrical conductivity
food containers because resistence to corosion

Question 22

what is a use for copper and why?

Answer 22

electrical wiring because of its good electrical conductivity and ductility

Question 23

what are the conditions for the rusting of iron and steel to form hydrogen iron III oxide

Answer 23

you need air and water to rust, and salt water speeds up this reaction

Question 24

what are some common barrier methods against rusting

Answer 24

painting, greasing, coating with plastic, or even with a less/ un reactive metal to prevent water and air from reachig iron and from iron III oxide

Question 25

explain sacrificial protection and give an example

Answer 25

using a more reactive metal on top of the iron surface, this way this metal will corrode first before rusing iron as it willl react before hand with the water and air instead of iron. an example is Zinc this is specifically called galvanising, used because more reactive than iron. In addition the more reactive metal loses electrons more easily and produces ions easier than iron.