Reactivity series And Metals

Question 1

List the metals in order of reactivity: from most reactive to least reactive

Answer 1

Potassium, Sodium, lithium, Calcium, Magnesium, Aluminium,CARBON ,Zinc, Iron, HYDROGEN, Tin, Lead, Copper, Silver, Gold

Question 2

The reactivity is worked out by reacting metals with what

Answer 2

Oxygen, Water, Dilute Acids

Question 3

Metal(s) + Steam(g) —> Metal Oxide(s) + Hydrogen(g)
State observations with Mg,Al,Zn,Fe

Answer 3

Magnesium: Bright white light, white solid formed, heat given out
(Powdered) Aluminium: Heat is given out, White solid formed
(Powdered) Zinc: yellow solid, then a white solid when cooled, heat given out
(Powdered) Iron: forms a black solid

Question 4

Metal(s)+ Water(l)—> Metal Hydroxide(aq)+ hydrogen(g)
State Observations with K, Na, Ca, Mg

Answer 4

Potassium: reacts very vigorously, lilac flame, melts into a tiny ball, moves and floats surface of water, heat released, disappears at the end, colourless solution formed, bubbles
Sodium: reacts vigorously, melts into a tiny ball, moves and floats on surface of water, bubbles, heat released, disappears, colourless solution formed
Calcium:reacts vigorously, Sinks then rises, Colourless solution with white precipitate, bubbles, heat released, disappears
Magnesium: reacts very, very slowly, few bubbles of gas over a long time

Question 5

Metal(s) + Oxygen(g) —> Metal Oxide(s)
State observations with K,Na,Ca,Mg,Al,Zn,Fe,Cu

Answer 5

Potassium: burns with a lilac flame, white solid
Sodium: burns with a yellow flame, white solid
Calcium: burns with a red flame, white solid
Magnesium: burns with a white light, white solid
Aluminium: burns when finely powdered, white solid
Zinc: burns producing yellow solid, white when cooled
Iron: iron fillings burns with orange sparks, black solid
Copper: Red brown copper glows red, blue-green flame, covered in a black layer

Question 6

Displacement

Answer 6

When a more reactive metal takes the place of a less reactive metal in a compound.

Question 7

P

Answer 7

Anything with copper- No reaction
With Iron only Copper: red-brown layer of copper on the iron fillings, blue colour fades
With Magnesium every but Itself:Cu- red-brown layer of copper on magnesium strip, blue colour fades. Zn and Fe- grey solid on magnesium ribbon.
With Zinc only copper and iron:Cu- red-brown layer of copper on zinc granules,blue colour fades. Fe- grey solid on zinc granules.

Question 8

Ore

Answer 8

A rock that contains a metal compound from which the metal can be extracted

Question 9

Two methods of extraction of metals from ores

Answer 9

Electrolysis(potassium, sodium, calcium, magnesium, aluminium
Reduction using Carbon(Zinc,Iron,Copper)

Question 10

Phytomining

Answer 10

Use of plants to absorb metal compounds from soil as part of metal extraction.

Question 11

Phytomining Steps for extraction of copper

Answer 11

1. Plants are grown in soil that contains copper compounds, the metal is absorbed from the ore and enters the plant.
2. Plants are harvested, dried, burned to produce ash(which is rich in metal compounds)
3. Acid added to the ash and the insoluble metal compounds react to produce a solution containing soluble copper compounds. This is called leachate
4. Add scrap iron to the leachate, displacement occurs, gives copper.

Question 12

Phytomining Advantages and Disadvantages

Answer 12

Advantages: Traditional methods involve digging, moving and disposing of large rocks causes noise and dust pollution, and uses large amounts of energy.(better for environment, less money)
Disadvantages: Slow process(plants to grow), supply is seasonal