Practical Stuff : Important! Flashcards
1
Q
What is the resolution of a burette and therefore what is its uncertainty
A
- resolution = 0.1cm^3
Therefore uncertainty = +/-0.05cm^3
2
Q
For which equipment do we have to double the percentage uncertainty
A
-Burette
-Balance
3
Q
Why do you have to double the percentage uncertainty for some equipment
A
- Because you’re taking two readings using that equipment
(Balance and burette takes two readings)
4
Q
How can you reduce the percentage uncertainty when measuring volumes
A
-Use a larger volume of the solution
-Use a larger measuring apparatus (e.g 1 50cm^3 measuring cylinder instead of 2 25cm^3 ones)
5
Q
What counts as concordant titres?
A
- Titres within 0.1cm^3 of each other
