Uh! But …since the concentration of Ca(OH)2 can't be high, than its concentration of OH- (aq) ions in dil. Ca(OH)2 must be low, then, wouldn't it have the same situation as it reacts with dil aqueous ammonia, and does not give precipitate?
Ummm no, haven't heard about it :(
It's about the initial concentration. Does it mean (let say we have Ca(OH)2 and CaCl2) if the Ca(OH)2 has a relative high concentration, then it can form insoluble Ca(OH)2?
Silly question lol
But Is there any reaction if calcium ion added to calcium hydroxide?
If NaOH or any alkali is added to metal ions, insoluble metal hydroxide is formed.
So, what if weak alkali Calcium hydroxide is added to Calcium ion, what will it happen? Will it has no reaction just like...
Thanks again.
So simply speaking, the blue area means the rusting has already taken place/ the rust is formed . And the pink area means it is going to form rust (coz hydroxide ions are produced before rust is formed.)
Am i right? :)
Thanks for replying.
Sorry, my bad. That is a typo.
I should write 'hydroxide ions' ,
the pink area shows the presence of HYDROXIDE ions .
But, i don't get it, even hydroxide ions is produced, what does it mean? Does it mean the pink area part is rusting?
Hello, everyone.
What do the blue and pink color the rust indicator shown mean?
Let say, the mixture of potassium hexacyanoferrate(III) and phenolphthalein is the rust indicator. And we use to detect the rusting of an iron nail. And the result is: the tip, head region of the nail appear blue...