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Topic: Molarity problem.  (Read 3614 times)

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Offline johnnyjohn993

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Molarity problem.
« on: November 08, 2014, 10:00:36 AM »
What volume of 0.1292 M of Ba(OH)2 would neutralize 50.00 mL of HCl solution standardized in the sample problem above?

my solution:

Ba(OH)2 + 2HCl  :rarrow: BaCl2 +H2O
Let x be the volume of  Ba(OH)2

moles of Ba(OH)2 : x L sol'n  *  0.1292 mol Ba(OH)2
                                                           __________________________
                                                                         1 L sol'n
= 0.1293 (x) mol  Ba(OH)2

Molarity of HCl :   0.1293 (x) mol  Ba(OH)2 *  2mol HCl
                                                                    _____________
                                                                              1mol Ba(OH)2

      0.2584 (x) mol HCl 
=   __________________ =  0.1292  M HCl
         0.05 L

x = 0.025 L of 0.1292 M  Ba(OH)2


QUESTIONs:
1) what molarity of HCl should I use, coz i used the same molarity of Ba(OH)2 to calculate the volume, is that wrong ?
2) what does it mean to neutralize HCl is there a specific molarity of neutralize HCl ?




Offline Borek

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Re: Molarity problem.
« Reply #1 on: November 08, 2014, 12:27:16 PM »
HCl solution standardized in the sample problem above?

There is no problem above.

Quote
0.1292 mol Ba(OH)2

Where you got it from? I am not saying it is wrong, I am not saying it is right, I am saying - it came from nowhere.
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