Quantitative Chemistry (Part 2)

Question 1

What is the empirical formula?

Answer 1

It is the simplest whole number ratio of the atoms of each element in a compound

Question 2

What is the molecular formula?

Answer 2

It is the actual number of atoms of each element in a molecule

Question 3

How to use limiting reactant?

Answer 3

When the question gives you two masses you find the limiting which is the one where it doesn’t have enough moles as is needed

Question 4

How to find percentage yield?

Answer 4

Actual yield
—————- X 100
Theoretical yield

Question 5

Hydrated meaning

Answer 5

Solid crystals contain water of crystallisation

Question 6

Anhydrous meaning

Answer 6

Does not contain water of crystallisation

Question 7

Water of crystallisation meaning?

Answer 7

Water that is chemically bonded into the crystal structure

Question 8

Degree of hydration meaning

Answer 8

The number of moles of water of crystallisation chemically bonded in 1 mole of the compound

Question 9

Dehydration meaning

Answer 9

Removal of water of crystallisation

Question 10

How to calculate the percentage of water of crystallisation in a compound?

Answer 10

Total RFM of water
————————— X 100
Total RFM of compound

Question 11

What is thermal decomposition?

Answer 11

It is the breakdown of a solid using heat