Moles Flashcards Preview

A- Level Chemistry > Moles > Flashcards

Flashcards in Moles Deck (5)
Loading flashcards...
1
Q

atom economy equation

A

mr of mass of desired product divided by the molar mass of all reactants multiplied by 100

2
Q

when should phenolphthalein be used as indicator?

A

when NaOH is used to titrate something with (to find the concertation of something else)

3
Q

when should methyl yellow be used as an indicator?

A

when HCl is used to titrate something with

4
Q

how are acids and alkalis hazardous?

A

at high concertation they are corrosive

at low concertation they are irritants

5
Q

how do you decrease apparatus uncertainties?

A

increase the measurement being taken

use equipment with higher resolution