Comments on: O Levels Chemistry Question: Metals & Reactivity Series

By: sean

sean — Wed, 05 May 2010 17:02:31 +0000

cool.

By: Saud

Saud — Sat, 27 Feb 2010 11:13:50 +0000

observing the reactivity series of the metals…………….Ca is below Na …………..this depicts that calcium is relatively less reactive than sodium. this means that calcium “less” prefers to be in forms of ions than sodium. this is said as sodium carbonate is more to heat than Calcium carbonate therefore CaCO3 decomposes better than Na2CO3.

By: sean

sean — Thu, 15 Oct 2009 05:41:17 +0000

Hi Okpewho,

Chlorine water is used as an disinfectant for municipal water for developed and developing countries. Chlorine can be applied for the deactivation of most microorganisms and it is relatively cheap.

Hope this information helps.

To Your Academic Success in Chemistry,
Sean Chua =)

By: sean

sean — Thu, 15 Oct 2009 05:37:43 +0000

Hi Waleed Bin Qasim,

Yes. Your thought on this question is spot on. Very good analogy using magnet also.

Keep up your good work.

To Your Academic Success in Chemistry,
Sean Chua

By: waleed bin qasim

waleed bin qasim — Fri, 09 Oct 2009 15:29:14 +0000

K
Na higher in reactivity series. very reactive but also forms a very stable compound. like a stronger magnet forms a stronger attraction.
Ca. hence below in the reactivity series less reactive as compared.and forms less stable or strong bond as compared.
Mg
.
.
C

sir do comment. waiting.