Purchase Solution

Oleum - Mass and Hazardous Features

Not what you're looking for?

Ask Custom Question

Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide.

A. What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 . 5SO3? Show your solution.

B. Discuss at least three potentially hazardous features associated with concentrated sulfuric acid.

Purchase this Solution

Solution Summary

A complete worked through solution for the percent by mass composition of this oleum related question is provided. Additionally, four hazardous features of concentrated sulfuric acid are detailed. Includes references.

Solution Preview

Hi there,

Consider the following information when formulating your answers.

Part A

To determine the percent by mass of SO3, you will need the molar mass of H2SO4 as well as SO3.

H2SO4 = 98.078 g/mol
SO3 = 80.063 g/mol

Now, we need to factor in the stoichiometric coefficients for each species in oleum to determine the molar mass of oleum.

Molar mass 3H2SO4 . 5SO3 = (98.078 x 3) + (80.063 x 5)

= 694.549 g/mol

The percent by mass of SO3 can then be calculated:

Percent SO3 = [(80.063 x 5) x 100]/694.549


Purchase this Solution

Free BrainMass Quizzes
Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.

Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.


The quiz helps in revising basic concepts about thermochemistry.

Functional groups in Organic Chemistry

You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.