Login

Search the forums now!

Welcome, Guest. Please login or register.

November 01, 2025, 12:36:34 pm
Pages: [1]   Go Down

Author Topic: heinemann book  (Read 510 times)  Share 

0 Members and 1 Guest are viewing this topic.

lisafaustina

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 317
  • Respect: +1
heinemann book
« on: August 30, 2010, 05:05:55 pm »
0
1. Do we have to know every single half equation for the Cells & Battery chapter? :S cos not all of them are on the data booklet...

2. on page 430 & 431, it says the oxidation reaction for the alkaline cell is Zn (s) + 2OH-(aq) ---> Zn(OH)2 (s) + 2e-.  But shouldn't it be Zn(s) + 2H20 (l) ---> Zn(OH)2 (s) + 2H+ + 2e- ?
Logged
2009 - Korean Second Language
2010 - Specialists | Methods | English | Biology | Chemistry

fady_22

  • Victorian
  • Forum Leader
  • ****
  • Posts: 557
  • Respect: +5
Re: heinemann book
« Reply #1 on: August 30, 2010, 05:46:25 pm »
0
2) No. The way you have learnt to balance redox equations in VCE is only for acidic solutions. As this is a basic solution, the way of balancing the half-equation is different, and so the reaction specified in the book is correct.

Logged
2009: Biology [46]
2010: Literature [44], Chemistry [50], Physics [46], Mathematical Methods CAS [46], Specialist Mathematics [42]

ATAR: 99.70

lisafaustina

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 317
  • Respect: +1
Re: heinemann book
« Reply #2 on: August 30, 2010, 05:48:02 pm »
0
ahhhhhhhhhhh okay thx
Logged
2009 - Korean Second Language
2010 - Specialists | Methods | English | Biology | Chemistry
Pages: [1]   Go Up