Calculations with moles

Question 1

What is the theoretical yield

Answer 1

Mass of a product that you expect to be produced

Question 2

Why is not always possible to obtain the theoretical yield

Answer 2

Some product can be lost when separated from reaction mixture

Unexpected side reactions between reactants

Reaction may be reversible

Question 3

Percentage yield equation

Answer 3

Actual yield/ theoretical yield

X100

Question 4

What is yield

Answer 4

Amount of product you actually get in a chemical reaction

Question 5

Why are higher atom economies more sustainable

Answer 5

Fewer atoms are being wasted in products that are not useful

Question 6

Equation for atom economy

Answer 6

Mr of useful products/ Mr of all products

X100

Question 7

What is the mole of any gas at room temp and pressure

Answer 7

24dm cubed

Question 8

How to calculate number of moles of a gas (2)

Answer 8

Volume/24dm cubed

Or

Volume/24000cm cubed

Question 9

Equation for concentration mol/dm cubed

Answer 9

Number of moles of solute/ volume of solution

Question 10

Steps for calculating concentration of unknown solution after a titration

Answer 10

Balance symbol equation

Work out moles of known solution using concentration x volume

Use ratio to find number of moles of unknown

Calculate concentration of unknown using moles/volume