anonymous
  • anonymous
please help me what is the molarity of an HBr solution if 0.500 liters are titrated to an end point by 0.100 liters of a 2.00M KOH Solution?
Chemistry
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SOLVED
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katieb
  • katieb
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Mertsj
  • Mertsj
\[M _{1}V _{1}=M _{2}V _{2}\]
Mertsj
  • Mertsj
\[M _{1}(.500)=2.00(.100)\]
anonymous
  • anonymous
thank you

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Mertsj
  • Mertsj
yw
anonymous
  • anonymous
0.40L
Mertsj
  • Mertsj
Why is it liters? liter is a measure of volume.
anonymous
  • anonymous
0.100 Lliters
Mertsj
  • Mertsj
When you solve for M, that is molarity. It would NOT be liters.
anonymous
  • anonymous
i don't know can you please explain me titration
Mertsj
  • Mertsj
You use a titration to neutralize a solution. Typically you use some indicator that changes color when the pH changes to neutral such a phenothalein.
anonymous
  • anonymous
thank you I got some idea
Mertsj
  • Mertsj
So the molarity of the HBr is .40 which means the solution contains .40 moles of HBr per liter of solution.
anonymous
  • anonymous
in my reference table I got titration formula M A V A= M B V B M A =molarity of H+ M B= molarity of OH- V A=volume of acid V b=volume of base
Mertsj
  • Mertsj
Yep. That's the same formula I posted.
anonymous
  • anonymous
I am got confuse what is it and how to
Mertsj
  • Mertsj
Do you understand now?
anonymous
  • anonymous
no i got little idea
anonymous
  • anonymous
what is those stands for how to put it in order to solve titration
Mertsj
  • Mertsj
MA = concentration of the acid. In your problem, the acid is HBr and MA is what we are trying to find.
Mertsj
  • Mertsj
VA is the volume of the acid. In your problem that is .500 liter
anonymous
  • anonymous
i got more now
Mertsj
  • Mertsj
MB is the concentration of the base. In your problem, the base is KOH and its concentration is 2.00
anonymous
  • anonymous
what is base
Mertsj
  • Mertsj
VB is the volume of the base which is .100 liter in your problem
Mertsj
  • Mertsj
A base has OH^- ions
anonymous
  • anonymous
oh ions can you explain
Mertsj
  • Mertsj
If you have something like sodium hydroxide...NaOH and dissolve it in water it dissolves and makes sodium ions and hydroxyl ions. The sodium ions have +1 charge and the hydroxyl ions have -1 charge. It is the hydroxyl ions that cause it to have the properties of a base.
anonymous
  • anonymous
thank you i got it now
anonymous
  • anonymous
thank you so much :D

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