***Chemistry concentration question***?


Posted on : 13-02-2014 | By : My Study Coach | In : Improve Your Concentration
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In a titration a student pipettes 10.00 mL of ammonia solution into his flask. It takes 19.47 mL of 0.278 M sulphuric acid to reach the equivalence point. Calculate the concentration of the ammonia solution in mol/L

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Comments (1)

is 0.278 the mole or the concentration?
If concentration then,
You will require a balanced equation to work out the conc of NH3

2NH3 + H2SO4 –> (NH4)2SO4

Therefore ratio is 1:2
n(NH3) = 2 x 0.0541
therefore concentration of NH3

I chose this way, as a titration is using a standard solution (known concentration) and an unknown solution(unknown concentration).

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