Finding energy supplies for the end of the world... by Tara Quenault https://padlet.com/que1/it7ljrp0h8ol Year 12 Chemistry, a.k.a. Doomsday Prepping 101 en-us 2018-03-22 08:08:50 UTC 2023-03-17 05:37:43 UTC hello@padlet.com The world has gone dark... que1 https://padlet.com/que1/it7ljrp0h8ol/wish/244872201 ...electricity is off, but we still need to power our refrigerators and lights. Show me how you could bring us a battery to help the cause. What chemical concepts are you employing, and what voltage range do you approximate your battery could produce? Is it rechargeable, or a fuel cell that doesn't require recharging?
OR
Can you make us a precious metal to sell on the Doomsday black market? Pull together some materials for an electrolytic cell!]]> 2018-03-22 08:30:39 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/244872201 An's (dodgy) Galvanic Cell https://padlet.com/que1/it7ljrp0h8ol/wish/245268217 - Tin Can (someone needs to drink the beer for me first)
- Lead Pencil (inert graphite electrode)
- Cleaning solution (contains NaOH)
- a multimeter (if I want to check the voltage)
- some very big alligator clips to connect everything up]]> 2018-03-22 22:34:08 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245268217 Another dodgy cell ngu0360 https://padlet.com/que1/it7ljrp0h8ol/wish/245269728 Use a copper bar and aluminium bar(perhaps copper nails and a chunk of al foil that you scratch a bit? Or use a can?) , connect them and use water and bleach(contains NaOH) as the electrolyte. Eventually the voltage will run out but you can replace the parts. 

Also, if you wanted a higher voltage, rig several cells up together :)]]> 2018-03-22 22:43:09 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245269728 Al and Cu galvanic cell https://padlet.com/que1/it7ljrp0h8ol/wish/245270521 Aluminium foil:
- Obviously made of aluminium
- Anode
- Strong reductant - undergoing oxidation

20c coin:
- Made of around 75% copper and 25% nickel
- Cathode
- Copper is stronger oxidant - undergoes reduction
- After copper reactants used up, nickel is then used as it is the next strongest oxidant

Electrolyte:
- Salt water

Alannah :)]]> 2018-03-22 22:48:56 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245270521 https://padlet.com/que1/it7ljrp0h8ol/wish/245271153 2018-03-22 22:53:42 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245271153 Margery’s galvanic cell https://padlet.com/que1/it7ljrp0h8ol/wish/245271268 - Table salt dissolved in the glass of water can be used as the electrolyte 
- Pencil (graphite) can be used as an inert electrode
- mint can (aluminium) can be cut into a strip and used as an aluminium electrode 
- the strips need to touching the saltwater and extending past the glass’s rim. (At the same time making sure they don’t touch each other) 
- then use a voltmeter to measure the voltage ie. E0 value (unfortunately I don’t have one at home) ]]> 2018-03-22 22:54:28 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245271268 Shuen's 100% Authentic Galvanic Cell https://padlet.com/que1/it7ljrp0h8ol/wish/245271889 Assuming that I have Ag2SO4, Ag, Zn and ZnSO4 at home, and an external circuit made of wire, this cell could be plausible. NaCl in the salt bridge is made from tissue soaked in common table salt dissolved in water. The potential difference is 1.56V, with Ag+(aq) being the oxidant and Zn(s) being the reductant.

The Ag/Ag+ half cell undergoes reduction and contains the cathode.

The Zn/Zn2+ half cell undergoes oxidation and contains the anode.

P.S. Ignore the light source on the top right hand corner pls ty :)]]> 2018-03-22 22:58:06 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245271889 Alyssa's super dodgy cell https://padlet.com/que1/it7ljrp0h8ol/wish/245272486 Anode: Aluminium Foil 
Cathode: $1 Coin (made out of copper)
Electrolyte: Lemon juice (citric acid) 
Some sort of wire to connect them all together
Predicted potential difference (under standard conditions and given this whole thing actually works) would be -1.66-(+0.15)=-1.81V 

]]> 2018-03-22 23:01:40 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245272486 Anh's dodge as cell https://padlet.com/que1/it7ljrp0h8ol/wish/245272639 Aluminium foil acts as the anode 
Coin (92% copper) acts as the cathode 
Electrolyte is the citric acid in the lemon 
The metal coat hanger can be used as the wire to connect the two electrodes together 
]]> 2018-03-22 23:02:36 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245272639 Cathrine’s fridge power generator https://padlet.com/que1/it7ljrp0h8ol/wish/245272665 Material:
$1 coin (92% copper) - anode
¥1 coin (100% aluminium) - cathode
Salt water - electrolyte
Wires
The fridge that needs power]]> 2018-03-22 23:02:48 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245272665 Anusha's Dodge Galvanic cell https://padlet.com/que1/it7ljrp0h8ol/wish/245273122 Anode: Aluminium foil
Electolyte: Table salt dissolved in water
Half Equ: Al(s) --> Al3+(aq) + 3e-

Cathode: Carbon (from my woodless graphite pencil)
Electrolyte: lemon juice containing citric acid 
Half Equ: H+(aq) + 2e- --> H2(g)

Wire use to connect circuit and salt bridge (toilet paper lol soaked in household cleaning cream mixed with water solution - that contains Calcium carbonate/other salts but not NaCl)

expected voltage: 1.66V]]> 2018-03-22 23:05:25 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245273122 Dodgy cell #5 https://padlet.com/que1/it7ljrp0h8ol/wish/245275061 Aluminium container as an electrode. 
Inert pencil graphite electrode.
Nacl water for the electrolyte. ]]> 2018-03-22 23:18:36 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245275061 Freddie's cell () https://padlet.com/que1/it7ljrp0h8ol/wish/245278360 Electrolytic cell: 
Electrolyte is citric acid from lemon, two electrodes which will be stuck in the lemon are a grey lead pencil (graphite) and a gold coin (mostly copper)
A voltmeter will then be connected to the electrodes.

]]> 2018-03-22 23:39:02 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245278360 doomsday galvanic cell (Annette) https://padlet.com/que1/it7ljrp0h8ol/wish/245278588 pencil lead (which is graphite, right?) as cathode
half eqn: O2(g) +4H+(aq) +4e- --> 2H2O(l)

keys (which let's pretend are silver because I have no idea what they actually are) as anode
half eqn: Ag(s) --> Ag+(aq) + e-

NaCl solution as electrolyte

Some kind of wire let's hope is conductive to connect the electrodes (allow electrons to flow from anode to cathode)]]> 2018-03-22 23:40:53 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245278588 Michelle's dodge battery https://padlet.com/que1/it7ljrp0h8ol/wish/245297603 This is a battery with multiple cells. 
Each cell is made of $0.20 coin and a layer of aluminium foil and cardboard soaked in lemon juice, the lemon juice acts as electrolyte (citric acid).
The copper in coin acts as cathode and the anode]]> 2018-03-23 01:36:20 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245297603 Nikita's cell bha0008 https://padlet.com/que1/it7ljrp0h8ol/wish/245301720 I made a galvanic cell out of a metal screw (I think it’s copper), aluminium foil and tissue soaked in salt (NaCl) solution. The copper screw and aluminium foil act as the two electrodes and the tissue separates them, hence separating the reduction and oxidation reactions. The NaCl(aq) acts as the electrolyte (as NaCl is soluble in water and can ionise). 
I drew in where the wires would connect!

]]> 2018-03-23 02:01:38 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245301720 melissa's cell https://padlet.com/que1/it7ljrp0h8ol/wish/245324268 earphone wire - copper wire, good at conducting electricity
photograph - has AgCl in it
fertiliser - electrolyte with KNO3 in it
coin - made of 92% Ni(s)

Galvanic cell with Ni(s) and Ag+(aq)
Spontaneous reaction will occur as Ag+ is a stronger oxidant 
Converts chemical energy to electrical energy 

]]> 2018-03-23 04:52:18 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245324268 Karlie's Cell https://padlet.com/que1/it7ljrp0h8ol/wish/245693022 Aluminium can  (stronger reductant) 
anode as it is oxidised 
(needs to be cut into strips to stick into the lime)

lime: citric acid is the electrolyte

$1 coin copper (stronger oxidant)
cathode as it is reduced
*missing: connecting wire*

]]> 2018-03-24 04:21:35 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245693022 Steph's Cell https://padlet.com/que1/it7ljrp0h8ol/wish/245781065 Aluminum foil: anode (strong reductant) 
*I realised solid iron isn't that great of an oxidant so i took a picture of a gold hoop earring as well. 
Gold earring: cathode (strong oxidant) 
Vinegar: electrolyte
Paper & NaCl solution: salt bridge
Wire hanger: external circuit
Glass cups: "beakers"
Lightbulb :) ]]> 2018-03-25 01:15:06 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245781065 Steph's Cell Pt 2 https://padlet.com/que1/it7ljrp0h8ol/wish/245781463 Here's my better oxidant]]> 2018-03-25 01:23:25 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245781463 Dodgy Galvanic Cell https://padlet.com/que1/it7ljrp0h8ol/wish/245809055 - Iron scissors as anode, undergo oxidation, losing electrons. 
- Copper from coin, melted as cathode, undergo reduction, gains electrons
- Salt water as electrolyte 
- Under SLC, voltage generated should be 0.78V]]> 2018-03-25 10:47:51 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245809055 Sabrina's Cell goh0012 https://padlet.com/que1/it7ljrp0h8ol/wish/245813268 Electrolyte: Salt water
Anode: Horseshoe (made from aluminium!)
Cathode:  50c coin (made from copper)

Missing: wire

Predicted potential difference (under standard conditions) -1.66-(+0.15)=-1.81V 

]]> 2018-03-25 11:35:11 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/245813268 Leanne's Cell https://padlet.com/que1/it7ljrp0h8ol/wish/246001052 Aluminum foil as an anode
graphite lead for pencils as cathode for H2O 
salt water as an electrolyte solution
iphone charging cable as wire 
insulated tape to keep it all together
cups as beakers
potential difference +1.67V
 ]]> 2018-03-26 10:05:27 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/246001052 Ramya's Cell https://padlet.com/que1/it7ljrp0h8ol/wish/246417163 Aluminium foil as a anode, Copper $1 coin as a cathode, and salt water as an electrolyte!]]> 2018-03-27 10:12:36 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/246417163 Clare’s Cell https://padlet.com/que1/it7ljrp0h8ol/wish/249104784 Salt water as the electrolyte, silver earring as the cathode and aluminium foil as the anode.]]> 2018-04-06 03:48:32 UTC https://padlet.com/que1/it7ljrp0h8ol/wish/249104784