zab30
Harmless
Posts: 1
Registered: 25-1-2016
Member Is Offline
Mood: No Mood
|
|
oleum
Can anybody tell very simply how much so3 by weight needs to be added to 96% sulfuric acid before it can be called 20% oleum
|
|
|
Tsjerk
International Hazard
Posts: 3032
Registered: 20-4-2005
Location: Netherlands
Member Is Offline
Mood: Mood
|
|
Do you know the densities of 96% H2SO4 and 20% oleum?
|
|
|
woelen
Super Administrator
Posts: 8014
Registered: 20-8-2005
Location: Netherlands
Member Is Offline
Mood: interested
|
|
It looks like this is homework.
I assume the percentages are by weight. In that case, proceed as follows:
Take 96% H2SO4. Take 100 grams of this. You have 4 grams of water. How many grams of SO3 is needed to make H2SO4 of that water? How many grams of
H2SO4 do you have in that situation? Now you add an additional amount of SO3, so that 20% of the total weight is SO3 and the remaining part is H2SO4.
This is NOT accomplished by adding 20% of that weight of SO3, you need to add more SO3.
If you want to compute e.g. how many grams of SO3 are needed to convert 100 ml of 96% H2SO4 to 20% oleum, then you need the density of 96% H2SO4 as
well. Density of 20% oleum is not needed in your computations.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
