Asked by Anon

Rank these to highest pH to lowest pH:
NH3, KOH, Ca(OH)2, HBr, HBrO

I put these in the same order for highest pH to lowest but still get it wrong.
Answered by Devron
KOH, Ca(OH)2 are strong bases, not sure about which one is the strongest, but I believe that it is KOH.

NH3 is a weak base

HBr and HBrO are strong acids. I believe that HBrO is the strongest acid, but I am not sure.


Increase in pH: KOH>Ca(OH)2>NH3>HBr>HBrO


Not sure though.
Answered by Anon
The answer you put is wrong.
Answered by DrBob222
HBrO is a weak acid, Ka = 2E-9
I would rank them the same but reverse the HBr/HBrO
Answered by Anon
So it would be KOH>Ca(OH)2>NH3>HBrO>HBr?
Answered by Devron
It could be this, but like I told you I am not sure

Increase in pH: KOH>Ca(OH)2>NH3>HBrO >HBr
Answered by Devron
He got it before I did.
Answered by Anon
It said it is still wrong. It said Which of the two strong bases will produce more OH ions per formula unit?
Answered by Devron
I do not think that you are telling us the everything, but lets say that you have equal moles of KOH and Ca(OH)2. Then Ca(OH)2 will produce more OH's because there are 2 OHs per mole in Ca(OH)2 compared to 1 OH per mole in KOH.
Answered by DrBob222
I would rank KOH stronger than Ca(OH)2 as a base;however, equimolar concns of each and the KOH is weaker than Ca(OH)2. But the problem doesn't say equimolar; in fact there is no concn given. In fact, we could make up solutions of HBr that are weaker acids than HBrO; again, the problem doesn't stipulate a concn so we must go with a "generic" which is stronger/weaker.
Answered by Meghan
Which substance has the highest boiling point?
a) NH3
b) Ca(OH)2
c) CO2
d)SO2
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