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# stuck af watch

1. a 25.37g sample of cleaner that contains ammonia is dissolved in water and the solution made up to 250cm3. a 25cm3 portion of this solution requires 37.3cm3 of 0.36 moldm-3 H2SO4 for neutralisation. what is the percentage of ammonia in the cleaner.

2NH3 + H2SO4 → (NH4)2SO4
2. (Original post by tomlfc)
a 25.37g sample of cleaner that contains ammonia is dissolved in water and the solution made up to 250cm3. a 25cm3 portion of this solution requires 37.3cm3 of 0.36 moldm-3 H2SO4 for neutralisation. what is the percentage of ammonia in the cleaner.

2NH3 + H2SO4 → (NH4)2SO4
And what have you tried so far?
3. (Original post by charco)
And what have you tried so far?
i don't know where to start
4. Complete this first

5. nope still don't know
6. (Original post by tomlfc)
nope still don't know
Are you studying AS or GCSE?
7. (Original post by TeachChemistry)
Are you studying AS or GCSE?
AS 😅
8. (Original post by tomlfc)
AS 😅
Surely you came across this at GCSE and are now just reviewing it at AS?
9. (Original post by TeachChemistry)
Surely you came across this at GCSE and are now just reviewing it at AS?
I've never done it before, its the wording of it like once i know the steps i can do it its knowing where to start and where to go from there thats my problem
10. (Original post by tomlfc)
I've never done it before, its the wording of it like once i know the steps i can do it its knowing where to start and where to go from there thats my problem
It's a titration problem. Did you complete the table as I suggested?

You know conc = mol/vol (in dm3)
11. (Original post by TeachChemistry)
It's a titration problem. Did you complete the table as I suggested?

You know conc = mol/vol (in dm3)
i think I've done it I'm just on the last bit of getting the percentage of ammonia in it but how would i do that?
12. (Original post by tomlfc)
i think I've done it I'm just on the last bit of getting the percentage of ammonia in it but how would i do that?

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