Electrolysis and Reactivity Series by Nicholas Law

Electrolysis and Reactivity Series by Nicholas Law https://padlet.com/hknick/11TCo5 en-us 2016-09-04 14:59:30 UTC 2025-09-25 08:39:32 UTC hello@padlet.com 1.48 - understand that an electric current is a flow of electrons / ions https://padlet.com/hknick/11TCo5/wish/121532770 2016-09-05 04:28:21 UTC https://padlet.com/hknick/11TCo5/wish/121532770 5.1 explain how the methods of extraction of the metals in this section are related to their positions in the reactivity series https://padlet.com/hknick/11TCo5/wish/121532794 Higher up reactivity series ➝ electrolysis, then Heat with carbon in blast furnace and lowest ➝ Heat only

| Potassium | Electrolysis
| Sodium | Electrolysis
| Lithium | Electrolysis
| Calcium | Electrolysis
| Magnesium | Electrolysis
| Aluminium | Electrolysis

| Zinc | Heat with carbon, Blast furnace
| Iron | Heat with carbon, Blast furnace
| Copper | Heat with carbon, Blast furnace

| Silver | Heat only
| Gold | Heat only

]]> 2016-09-05 04:28:41 UTC https://padlet.com/hknick/11TCo5/wish/121532794 1.49 - understand why covalent compounds do not conduct electricity https://padlet.com/hknick/11TCo5/wish/121532808 covalent compounds don't have mobile and delocalised electrons so they are unable to ensure flow of electrical charges]]> 2016-09-05 04:28:58 UTC https://padlet.com/hknick/11TCo5/wish/121532808 1.50 - understand why ionic compounds conduct electricity only when in molten or in solution https://padlet.com/hknick/11TCo5/wish/121532834 ionic compounds have oppositely charged ions that are mobile in aqueous & molten states, able to ensure a flow of electric charges]]> 2016-09-05 04:29:24 UTC https://padlet.com/hknick/11TCo5/wish/121532834 1.51 - describe experiments to distinguish between electrolytes and non-electrolytes https://padlet.com/hknick/11TCo5/wish/121532898 make an electric circuit with a break in the wire. when you put both ends in a solution and the LED lights up, the current flows -- electrolyte]]> 2016-09-05 04:30:17 UTC https://padlet.com/hknick/11TCo5/wish/121532898 1.52 - understand that electrolysis involves the formation of new substances when ionic compounds conduct electricity https://padlet.com/hknick/11TCo5/wish/121532945 cations attracted to cathode
anions attracted to anode]]> 2016-09-05 04:30:57 UTC https://padlet.com/hknick/11TCo5/wish/121532945 5.4 describe and explain the main reactions involved in the extraction of iron from iron ore (haematite), using coke, limestone and air in a blast furnace https://padlet.com/hknick/11TCo5/wish/121533074 Oxygen in the air reacts with coke to form carbon dioxide
- C(s) + O2(g) --> CO2(g)

Carbon dioxide reacts with coke to firm carbon monoxide

- CO2(g) + C(s) --> 2CO(g)

Carbon monoxide reduces iron (III) oxide in iron ore
- Fe2O3 + 3CO(g) --> 2Fe(l) + 3CO2(g)

Calcium carbonate in the limestone decomposes to form calcium oxide

- CaCO3(s) --> CaO(s) + CO2(g)

Calcium oxide reacts with silicon dioxide, which is an impurity in iron ore, to form calcium silicate

- CaO(s) + SiO2(s) --> CaSiO3(l)

]]> 2016-09-05 04:32:37 UTC https://padlet.com/hknick/11TCo5/wish/121533074 1.53 - describe experiments ot investigate electrolysis using inert electrodes of molten salts such as lead (II) bromide and predict the product https://padlet.com/hknick/11TCo5/wish/121533087 lead forms at cathode
bromine forms at anode]]> 2016-09-05 04:32:44 UTC https://padlet.com/hknick/11TCo5/wish/121533087 Aluminium Extraction - 5.2 describe and explain the extraction of aluminium from purified aluminium oxide by electrolysis, including: i the use of molten cryolite as a solvent and to decrease the required operating temperature ii the need to replace the positive electrodes iii the cost of the electricity as a major factor https://padlet.com/hknick/11TCo5/wish/121533181 Method: electrolysis
Aluminium ore: Bauxite
Dissolved in molte cryolite to decrease melting point temperature

Expensive because:
- The high temperatures burn the carbon anode forming CO2. They have to be replaced
- Great use of electricity is expensive

]]> 2016-09-05 04:34:16 UTC https://padlet.com/hknick/11TCo5/wish/121533181 1.54 - describe experiments to investigate electrolysis, using inert electrodes, of aqueous solutions such as sodium chloride, copper (II) sulphate and dilute sulphuric acid and predict the products https://padlet.com/hknick/11TCo5/wish/121533247 NaCl - sodium & chlorine
CuSO4 - copper and oxygenlll
H2SO4 dilute - hydrogen and oxygen]]> 2016-09-05 04:35:04 UTC https://padlet.com/hknick/11TCo5/wish/121533247 1.55 - write ionic half equations representing the reactions at the electrodes during electrolysis https://padlet.com/hknick/11TCo5/wish/121533319 Na+ + e- ==> Na
2Cl- ==> Cl2 + 2e-]]> 2016-09-05 04:36:00 UTC https://padlet.com/hknick/11TCo5/wish/121533319 5.5 explain the uses of aluminium and iron, in terms of their properties https://padlet.com/hknick/11TCo5/wish/121533446 Aluminium: aeroplane bodies, overhead power cables, saucepans, food cans, window frames.
- high strength-to-weight ratio
- good conductor of electricity
- good conductor of heat
- non-toxic
- resists corrosion

Iron: car bodies, iron nails, ships, bridges
- strong]]> 2016-09-05 04:37:25 UTC https://padlet.com/hknick/11TCo5/wish/121533446 5.3 write ionic half-equations for the reactions at the electrodes in aluminium extraction https://padlet.com/hknick/11TCo5/wish/121533463 Al³⁺ + 3e⁻ ➝ Al(l) (Cathode & reduced)

2O²⁻ ➝ O₂ + 4e⁻ (Anode & oxidised)

]]> 2016-09-05 04:37:44 UTC https://padlet.com/hknick/11TCo5/wish/121533463 2.29 understand that metals can be arranged in a reactivity series based on the reactions of the metals and their compounds https://padlet.com/hknick/11TCo5/wish/121611205 Potassium
Sodium
Lithum
Calcium
Magnesium
Aluminium
Zinc
Iron
Copper
Silver
Gold]]> 2016-09-05 15:27:02 UTC https://padlet.com/hknick/11TCo5/wish/121611205