titration calculations (1 Viewer)

[persephone]

when we did titration my teacher was pretty relaxed but what were we supposed to do with out results? you know after the phenolphthalein changed colour. etc

 

[smallcattle]

umm you suppose to calculate the cencentration of the unknown base??

 

[lucyinthehole]

use c1v1 = c2v2

sub in the things you know to figure out concentration of whatever it is you're trying to find the conc of (the whole point of titrations)

 

[aim54x]

u have the exact amount of the acid used to neutralised the base.

write a balenced equa 4 d react.

work out how many moles of the of the secondary is present as u know the conc n vol of the standard

these r the ones u need i think.

n=cv
n=m/mw

its kinda hard to explain without everythin in front but i've had a go. ask further Q's if needed

 

[bobbie212]

C1V1 thing only works wen mol ratio is 1:1 i think

 

[VVoody]

You can also use n = cv

 

[lucyinthehole]

C1V1 thing only works wen mol ratio is 1:1 i think

no, cos say the ratio is 2:1, you just put 2(c1v1) = c2v2

 

[tina_goes_doo]

It's still safer to use n=cv. Both my teacher and two tutors have said to use this during the HSC.

 

[smallcattle]

yeah n=cv is more convenient and my teachers all liked this