Calculating Atom Economy & Addition + Substitution Reactions

How to work out percentage atom economy?

(Molecular mass of desired product) / (sum of molecular masses of all products) X100

How do you calculate the atom economy for a reaction?

Find the molecular mass of the product you're interested in, add up the molecular masses of the products, and put them both into the formula.

What should you use when calculating the masses?

The number of moles of each compound that's in the balanced equation

What happens in an addition reaction?

The reactants combine to form a single product

What's the atom economy for addition reactions?

Always 100% since no atoms are wasted.

What's a substitution reaction?

One where some atoms from one reactant are wrapped with atoms from another reactant

What does a substitution reaction always result in?

At least 2 products, the desired product and at least 1 by-produce.

What's the atom economy for substitution reactions?

Always less than 100%