Chemistry: Post your doubts here!

[Jenna Anadachee]

please help for chemistry a level question 1(a) in https://papers.gceguide.com/A Levels/Chemistry (9701)/2010/9701_s10_qp_42.pdf

 

[imlanguages]

hi all friends how are you i am new here and good to here and i want to know where to learn german in hong kong because i live in hong kong

 

[Justice league 125]

Does anyone here have AS chemistry topical past papers?

 

[Hmostafa]

You need to consider

Fe3+ + e --> Fe2+ E= +0.77
V2+ + 2e --> V

2Fe2+ + V --> 2Fe2+ + V2+

Fe3+ + e --> Fe2+
V3+ + e --> V2+

Fe3+ + V2+ --> V3+ + Fe2+

Fe3+ + e --> Fe2+
VO2+ + 2H+ + e --> V3+ + H2O

Fe3+ + V3+ +H2O --> 2H+ + VO2+ + Fe2+

Now you can see that for the conversion of V to VO2+, you need 4Fe3+ which yield 4Fe2+. Combining the equations, you get this:

4Fe3+ + V3+ H2O --> 2H+ VO2+ + 4Fe2+

which year this question

 

[liza123]

Hi everyone, AsSalamoAlaikum Wr Wb..

To get things organized in a better way, I am making this thread. As othewise, some queries remain unanswered!

So post your CHEMISTRY doubts in this thread. InshaAllah members around will help you.

Any Chemistry related notes and links will be added here in this post. Feel free to provide the links to your notes around the forum, or any other websites!

Chemistry Notes:


http://www.chemguide.co.uk This is the website, which contains almost everything classified according to the syllabus.

Tips for solving chemistry MCQs 9701/01

Chemistry P5 Tips and Notes

Some links & Notes - by 'destined007'

Chemistry worksheets Link shared by hassam

Chemistry Application Booklet: Mistakes and Corrections!

Calculations for A level Chemistry, author E.N. Ramsden third edition ebook download.


Regards,
XPC Staff.

Can any one plz send me the chapter end questions and answers of As and A level chemistry 3rd edition?

 

[note11]

9701/51/m/j/ 21
Ques2...d(iv)