Go Back   Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum > Regional Molecular Biology Discussion > Forum Chemie
Register Search Today's Posts Mark Forums Read

Forum Chemie Forums Chemie. Das Forum für die Chemie.


exercise

exercise - Forum Chemie

exercise - Forums Chemie. Das Forum für die Chemie.


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-14-2004, 08:17 PM
Too Old w Tomaszowie
Guest
 
Posts: n/a
Default exercise



On my chemistry lesson I had this sort of exercise:
Make the balance in this reduction-oxydation reacition:
K2CrO4(aq) + C3H7OH + HCL ---> CrCl3(aq) + C2H5CHO + H2O + KCl(aq)
Anyone can help me? Thx!


--



--
pozdrawiam, kochany rekinek kolcobrzuchaty = J.K. Chiliñski
"TooOld"=Transforming Organism Optimized for Observation and Logical Destruction
[Only registered users see links. ]
Reply With Quote
  #2  
Old 10-14-2004, 08:58 PM
Annett Klostermann
Guest
 
Posts: n/a
Default exercise


2K2CrO4(aq) + 3C3H7OH + 10HCL ---> 2CrCl3(aq) + 3C2H5CHO + 8H2O + 4KCl(aq)


Reply With Quote
  #3  
Old 10-14-2004, 09:42 PM
Joerg Geiger
Guest
 
Posts: n/a
Default exercise

Too Old w Tomaszowie <[Only registered users see links. ].pl> wrote:

(+6) (+3)
CrO_4^2- + 3e^- + 8H^+ ----> Cr^3+ + 4H_2O |*2

(-1) (+1)
CH_3CH_2CH_2OH ----> CH_3CH_2CHO + 2e^- + 2H^+ |*3
---------------------------------------------------------
2 CrO_4^2- + 3 C_3H_7OH + 10 H^+ ----> 2 Cr^3+ + 3 C_2H_5CHO + 8 H_2O

and next time you can solve it yourself.

--
Joerg Geiger
joerg_geiger(at)web.de
| "Don't be discouraged son. Albert Einstein turned himself all sorts of |
| colors before he invented the light bulb." Homer Simpson |
Reply With Quote
  #4  
Old 10-15-2004, 05:47 AM
Too Old w Tomaszowie
Guest
 
Posts: n/a
Default exercise

Witaj m³oda, polska, piêkna inteligencjo - Internauta Joerg Geiger
napisa³(a), a
oto oficjalna odpowied¼ naszego wys³annika na rubie¿y polskiego
internetu :


Vielen Dank. Das ist eine Aufgabe aus drittes Klass Liceum und ich bin im
erste.


--
pozdrawiam, kochany rekinek kolcobrzuchaty = J.K. Chiliñski
"TooOld"=Transforming Organism Optimized for Observation and Logical Destruction
[Only registered users see links. ]
Reply With Quote
  #5  
Old 10-15-2004, 12:24 PM
J?rgen Clade
Guest
 
Posts: n/a
Default exercise

Hello,


This equation is wrong: Chromate cannot coexist with acids like
aqueous hydrogen chloride. Tell your chemistry teacher that he must
use dichromate.

MfG,
Jürgen
Reply With Quote
Reply

Tags
exercise


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
>>>> LOWER CHOLESTEROL <<<< Janis Stroud Forum Physik 0 09-22-2009 04:39 PM
What are the short term effects of exercise on gas exchange? Tralala Biology Forum 2 06-23-2009 08:17 PM
Please help me..Chemistry's exercise..10pt now? adryblonde Chemistry Forum 0 06-22-2009 09:17 PM
Some exercise about AC lg Physics Forum 6 09-14-2008 07:29 AM


All times are GMT. The time now is 08:30 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005 - 2012 Molecular Station | All Rights Reserved
Page generated in 0.13758 seconds with 16 queries