SC14

Question 1

Why is actual yield less than theoretical yield?

Answer 1

• unwanted side reactions can take place
• when conducting the experiment some product may be left behind when transferring to another apparatus
• the reaction may be incomplete so all the reactants have not reacted

Question 2

What is the equation for percentage yield?

Answer 2

(actual yield/theoretical yield) x 100

Question 3

What is the equation for atom economy?

Answer 3

(Mr of useful product produced/Mr of total product produced) x 100

Question 4

What is atom economy?

Answer 4

it is a method of showing the amount of useful product produced

Question 5

How to calculate concentration in mol/dm^3 using concentration g/dm^3?

Answer 5

grams per decimetres cubed divided by relative formula mass(Mr)

Question 6

What are concordant results?

Answer 6

results that have a small range of 0.1 or 0.05

Question 7

What is the meniscus?

Answer 7

it is the curved formed at the top of the liquid in the burette and only the bottom part is measured

Question 8

What is the molar gas volume at room temperature and pressure (rtp)?

Answer 8

24dm^3 or 24000cm^3

Question 9

What is the equation for amount of gas in mols using molar volume?

Answer 9

volume of gas/ molar volume