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25 grams oleum contains 30% free SO3. Calculate strength of oleum.

a s , 8 Years ago
Grade 11
anser 1 Answers
Vikas TU

Last Activity: 8 Years ago

The reaction for the oleum is:
H2SO4 ======>                SO3   +  H2O
 25/98 moles we get         25/98 moles of SO3.
30%of SO3 => 0.3*25/98
Strength => (15/98*2)*100/(25/98) = 50%

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