Posted by Nia on Monday, October 17, 2011 at 11:12pm.
Assuming equal concentrations , rank these solutions by pH. RbOH(aq), NH3(aq), HF(aq) HBr(aq), Ca(OH)2(aq).
I know the most acidic solution has the lowest pH and the most basic solution has the highest pH. But how am i supposed to know the pH if i don't know the concentration of each solution?
Chemistry - DrBob222, Monday, October 17, 2011 at 11:33pm
I think the secret is in the wording of the problem. It says assuming EQUAL concns.....
I would divide these into bases and acid.
RbOH, NH3 and Ca(OH)2.
RbOH is the highest OH, followed by Ca(OH)2 and NH3. I rank RbOH higher than Ca(OH)2 because Ca(OH)2 isn't a soluble as RbOH.
HBr is a strong acid; HF is a weak acid. You should be able to rank all of them now.
Chemistry - Bawl, Tuesday, April 16, 2013 at 10:44pm
It was on my homework too and this came out right
Chemistry - Anonymous, Thursday, November 21, 2013 at 8:28pm
Chemistry - YOYA, Monday, October 26, 2015 at 2:52pm
Chemistry - At, Thursday, January 12, 2017 at 3:42am
In acids, more electronegativity is more acid power.
In bases, less electronegativity is more bas power.
Because H is positive and elements with high electronegativity pushs more H+. So with this our acid will be more powerful.
And as same as acids, we calculate bases powers with this way.
Less electronegative elements pushes more OH-. So our bas becomes more powerful.
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