Shipwrecks (1 Viewer)

annabackwards

<3 Prophet 9
Joined
Jun 14, 2008
Messages
4,670
Location
Sydney
Gender
Female
HSC
2009
lol this isnt so much of an answer but:

first question: WTF!! lolol
Yeah, i got part 1 as aluminium but for the 2nd part i made up stuff :/

For the silver plating, did you guys just make an electrolytic cell with the spoon as the cathode and Silver Nitrate electrolyte?
 

Marina89

Member
Joined
Mar 16, 2009
Messages
47
Gender
Female
HSC
2009
Yeah I did that but I didn't know what anode to use.. what did you use?
 

bayan92

Member
Joined
Feb 24, 2008
Messages
231
Gender
Male
HSC
2009
Yer...

Platinum (anode) - graphite/stainless steel
Artifact (cathode)
Silver nitrate - electrolyte
 
Last edited:

GUSSSSSSSSSSSSS

Active Member
Joined
Aug 20, 2008
Messages
1,104
Location
Turra
Gender
Male
HSC
2009
Yeah I did that but I didn't know what anode to use.. what did you use?
any inert metal =S i just used stainless steel like the stimulus piece given above

Yeah, i got part 1 as aluminium but for the 2nd part i made up stuff :/

For the silver plating, did you guys just make an electrolytic cell with the spoon as the cathode and Silver Nitrate electrolyte?
hahaha yea first part was nice n easy,,,,but in the second i was WTF?!?!?!?! and just described uses of: more suitable metals, coating with less reactive metals, and painting as methods of protection =S
 

annabackwards

<3 Prophet 9
Joined
Jun 14, 2008
Messages
4,670
Location
Sydney
Gender
Female
HSC
2009
I just said an inert graphite electrode was used as the anode.

And then i have equations showing Ag+ getting reduced and water being oxidised.

I'm hoping i'm right, made it up on the spot XD

hahaha yea first part was nice n easy,,,,but in the second i was WTF?!?!?!?! and just described uses of: more suitable metals, coating with less reactive metals, and painting as methods of protection =S
I compared it to aluminium and the inside of aluminium cans has to coated in something else as well because otherwise it'd react with acids in soft drinks etc etc... gah such a dodgy answer lol
 

bayan92

Member
Joined
Feb 24, 2008
Messages
231
Gender
Male
HSC
2009
My friend said that he wrote now the Laws of Electrolysis by Faraday. Was this necessary do you think?
 

sam5

Member
Joined
Jun 28, 2009
Messages
473
Gender
Male
HSC
2009
FUCK

I put the negative wire to the inert thing and the positive wire to the spoon (shoulda had other way round).

How many marks would i lose for doin that?
 

bayan92

Member
Joined
Feb 24, 2008
Messages
231
Gender
Male
HSC
2009
FUCK

I put the negative wire to the inert thing and the positive wire to the spoon (shoulda had other way round).

How many marks would i lose for doin that?
Out of 3. So you will probably get 1 for having the right idea?
 

Dr. Zoidberg

Member
Joined
May 23, 2008
Messages
132
Location
Sydney
Gender
Male
HSC
2009
lols, i wrote about molten silver for electrolysis with the spoon and a platinum electrode
 

osamaelias

Member
Joined
Mar 16, 2008
Messages
90
Gender
Male
HSC
N/A
7 Marker was easily predictable this year , in 2008 nothing from focus area 1-4 was included , yeh nothing.

So 100% it would have been from there as i expected , and it did.

As for the question asked about silver , it is an exact question ripped from conquering chemistry , have a look at it.

Make the spoon, anode , and thus the silver gets electrons from it , therfore plating on it.

Goodluck
 

kwokie

Member
Joined
Nov 9, 2007
Messages
60
Gender
Male
HSC
2009
Reduction occurs at cathode, so shouldnt u make the spoon cathode so Ag ions get reduced there to form ag solid. but this paper was fucking hard i had no idea
 

mitchwong650

Member
Joined
Apr 13, 2009
Messages
52
Gender
Undisclosed
HSC
2009
Man i pumped this section. i loved the 7 marker on the scientists haha.

although i agree, a part II was dodgy for me, but the rest of it was totally fine.
 

jess6

New Member
Joined
Mar 28, 2009
Messages
11
Gender
Female
HSC
2009
i used the stainless steel electrode for the electroplatting question
 

xFusion

Member
Joined
Sep 28, 2008
Messages
161
Gender
Female
HSC
2009
LOL omg wtf was I thinking. I didnt even know what silver plating meant and I wrote some shit about dipping the spoon into the solution and drying it:rofl:
 

dekimasu

Member
Joined
Feb 6, 2009
Messages
37
Location
Sydney
Gender
Male
HSC
2009
Yer...

Platinum (anode) - not silver as it is in a SCHOOL laboratory
Artifact (cathode)
Silver nitrate - electrolyte
haha. platinum costs over 100 times silver per gram. what type of school do you go to? i put graphite rod.
 

mitchwong650

Member
Joined
Apr 13, 2009
Messages
52
Gender
Undisclosed
HSC
2009
haha. platinum costs over 100 times silver per gram. what type of school do you go to? i put graphite rod.

i lol'd at that too. nice sig ;)

and uhhh yes. i just used something that wouldnt react in place of Ag+ ions
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top