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Flashcards in Reacting Quantities Deck (10):
1

What is meant by the stoichiometry of the reaction?

The ratio of each substance in the reaction.

2

What are the three reasons why a theoretical yield is difficult to achieve?

Reaction may not go to completion
Side reactions may have occurred
Purification of the product may lead to some loss of the product

3

Is the actual yield usually higher or lower than the theoretical yield?

It is lower.

4

How do you find the percentage yield?

Actual yield/theoretical yield X100

5

What is a limiting reagent?

This is a reactant that is not in excess.

6

What do calculations need to be based on?

The limiting reagent.

7

What is meant by atom economy?

This is a measure of how well atoms have been utilised.

8

What are two features of reactions with high economies?

Produce a large proportion of desired products and few unwanted waste products.
They are important for sustainability as they make best use of natural resources.

9

What does atom economy assume?

100% yield

10

What is atom economy solely based on?

The balanced chemical equation for a reaction.