Ch5 Amount of substance- moles in solution

Question 1

Moles formula

Answer 1

n= vc

Question 2

Dilution formula

Answer 2

concentration of original solution / concentration of diluted solution

Question 3

Titration method

Answer 3

1. Using a pipette, take 23cm^3 of alkali
2. transfer solution to conical flask
3. Add a few drop of methyl orange indicator which will at first appear yellow
4. Place acid in a burette and note the initial reading
5. Add the acid carefully from burette until the indicator turns orange(neutral point)
6. Note the final reading of the burette and subtract it from initial reading to get titre
7. Repeat titration until concordant results are obtained then calculate a mean average

Question 4

Concordant results

Answer 4

Volume is accurate to within 0.1cm^3 of one another

Question 5

percentage yield

Answer 5

mass of product obtained/ theoretical mass of product

Question 6

atom economy

Answer 6

Mr of desired product/ sum of Mr of all products