Chemistry

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Chemistry Question

Someone please help

Ok so the Ar (relative atomic mass) is not donné while it is donné to all the rest problems so assume that I have to work without the Mr ( relative molecular mass).

500 mL of sodium hydroxide(NaOH) solution 8% w/v is mixed with NaOH solution of molar concetration 0,8 M. Calculate the molar concetration of the final solution.

Now, I aplogize if there are any mistakes in the translation since I had to translate the terms from the ones used in greek.Can this problem be solved with the data donné ou shall I simply find the Mr assuming that the fact that the Ar is not donné is a mistake?
 fake_alibi13 posted il y a plus d’un an
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Chemistry Réponses

DarkCEpitome said:
Umm, okay.... :/

So, out of 500 mL of sodium hydroxide solution, 8% is taken and mixed with the solution of molar concentration0,8M.

Alright, let's see here...

Just looked up the formula for molar concentration:
C = (m/v) * (1/MW)

The volume, I assume, would be 500.

W/V = 8

So, separately both W and V would be 8?

Okay. So if I put that together;

C = (8/500) * (1/64)

And the answer in that case, the product would be;

0.00025

Yeah, I really don't think I did this right, hun. :/

Sorry.


I just recently joined this spot because toi linked me here, and so I could possibly learn a little bit plus about chemistry xD
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posted il y a plus d’un an 
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Screwed up the translation, the whole thing is mixed but the solution is 8% w/v pure sodium hydroxide...
fake_alibi13 posted il y a plus d’un an
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The rest I suppose is water
fake_alibi13 posted il y a plus d’un an
Book-Freak said:
ummm, guessing here, but I think it could be 400moldm (to the the power of) -3.

What grade is this, btw?
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posted il y a plus d’un an 
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As it is here in greece first an of high school, I am 16
fake_alibi13 posted il y a plus d’un an
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Thanks... that means I may be doing something like that soon... oh dear
Book-Freak posted il y a plus d’un an
Healerfan said:
For me some data is missing ou I couldn't read it out of your question

First do toi mix 500mL 8%NaOH solution with 0.8M solution ou do toi have 500mL endsolution?

ou if toi mix 500mL 8% NaOH with how much 0.8M solution are toi mixing the new one?


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posted il y a plus d’un an 
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Nevermind solved it... And data were missig I solved it after I got them...
fake_alibi13 posted il y a plus d’un an
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