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| < Off-Topic ~ Little Challenge for science Peoples |
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 Posted:
Wed Jan 13, 2010 4:25 pm
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Wiz-Meister
Joined: 04 Jan 2009
Posts: 391
Location: South Carolina
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Well, my science teacher decided to have a little contest. He gave out an equation to be turned in Feb. 1 for 15! extra credit points on next test. It goes like this: ( remember numbers are subscripts.)
K4Fe(CN)6 + KMnO4 + H2SO4 --------> KHSO4 + Fe2(SO4)3 + MnSO4 + HNO3 + CO2 + H2O
Balance it. More posting for Wondercheese, but anyone taking Chemistry or Physical Science could use a practice/challenge too, im sure.
P.S. NO I'M NOT DOING THIS TO FIND THE ANSWER! I ALMOST HAVE IT DONE!   |
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Wed Jan 13, 2010 5:55 pm
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Museum Curator
Joined: 29 Jul 2006
Posts: 1474
Location: Central North Dakota, aka The Middle of Nowhere
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Google > your science teacher.
K4Fe(CN)6 + KMnO4 + H2SO4 = KHSO4 + Fe2(SO4)3 + MnSO4 + HNO3 + CO2 + H2O =>
10 K4Fe(CN)6 + 122 KMnO4 + 299 H2SO4 = 162 KHSO4 + 5 Fe2(SO4)3 + 122 MnSO4 + 60 HNO3 + 60 CO2 + 188 H2O
http://www.webqc.org/balancedchemicalequations-061108-7.html |
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Wed Jan 13, 2010 7:40 pm
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Wiz-Meister
Joined: 04 Jan 2009
Posts: 391
Location: South Carolina
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| ... the point is to NOT use the internet for this thing though... grrr... and those are some BIG numbers. |
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| Posted:
Wed Jan 13, 2010 8:05 pm
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Museum Curator
Joined: 29 Jul 2006
Posts: 1474
Location: Central North Dakota, aka The Middle of Nowhere
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| wiz13 wrote: | | ... the point is to NOT use the internet for this thing though... |
And you're asking the question where again? |
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| Posted:
Wed Jan 13, 2010 8:49 pm
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Wiz-Meister
Joined: 04 Jan 2009
Posts: 391
Location: South Carolina
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| lol XD maybe my science teacher will let me use the internet insted of figuring this all out... but 15 points is a lot compared to the 1 point i got for the test tomorrow... Oh snap i need to study XD |
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Wed Jan 13, 2010 11:07 pm
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Museum Curator
Joined: 29 Jul 2006
Posts: 1474
Location: Central North Dakota, aka The Middle of Nowhere
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If you really want to know how this mess is derived, I have some hints:
You have six times as much CO2 and HNO3 as you have K4Fe(CN)6. Can't get the carbon and nitrogen anywhere else.
You can treat SO4 as one unit. That sulfur/oxygen molecule portion isn't separating out.
You have exactly as much KMnO4 as you do MnSO4. One source of manganese.
You have twice as much Fe2(SO4)3 as you do K4Fe(CN)6. One source of iron. |
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Community: We want new Megas!
a finger on the monkey's paw curls: we get them, and they're hideous |
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| Posted:
Thu Jan 14, 2010 3:21 pm
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Joined: 18 Mar 2008
Posts: 291
Location: Washington, USA
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| Ooh, that will be fun! I won't have time to play with it until this weekend, I have to prep for the lab I teach today and then I teach ALL DAY on Friday. I'd make them do it, but it's not a chem course.... |
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Thu 21:53] wondercheese: we weren't trying to cause damage, and we DID pay for the broken lotion! |
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Thu Jan 14, 2010 5:02 pm
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Wiz-Meister
Joined: 04 Jan 2009
Posts: 391
Location: South Carolina
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Yep, he just announced google will get us no where except for checking answers. We have to work it out in front of him. And he knows we can't get numbers like 228 out of nowhere.
time to get to it! |
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