Quantitative Chemistry(Moles)

Question 1

What is 1 mole equivalent to?

Answer 1

6.02 multiplied by 10 to the power of 23

Question 2

What is concentration?

Answer 2

Concentration is a measure of the number of moles

in 1 dm cubed of an acid

Question 3

How do you work out number of moles?

Answer 3

Number of moles= Mass/Molar Mass

Question 4

How do you work out concentration?

Answer 4

Concentration=number of moles / Volume /1000

Question 5

What is titration?

Answer 5

Titration is the process used to find the concetration

of an acid or an alkali

Question 6

What is the method of titration?

Answer 6

1. Place some acid or alkali into a conical flask using a pipette/
   2.Place the acid or alkali into a burette.
   3.Add a suitable indicator to the conical flask. E.g:
   phenol red
   4.Add the acid or alkali from the burette into the flask
   until the colour changes.
2. Note the final reading
3. Repeat the experiment and try to get the results concordant.

Question 7

How do you work out the moles of a gas?

Answer 7

Moles of gas=vol/24 dm3

Question 8

How do you find out the concentration in g/dm3?

Answer 8

Molar Mass X concentration in mol/dm3