titration calculations (1 Viewer)

[melllyy]

i was wondering (this may be a silly question) but i cant do these calculations very well. any ideas how i can improve other than practice questions?

 

[melllyy]

Any Help?!

 

[priesty]

any ideas how i can improve other than practice questions?

no.

 

[Riviet]

i was wondering (this may be a silly question) but i cant do these calculations very well. any ideas how i can improve other than practice questions?

It might be helpful if you tell us exactly what you're having trouble with... using the equations? Interpreting the question?

 

[Darkening]

read the text book lol... or ask your teacher, im getting one on one with him now because im like lowest of the class

 

[Tim035]

Umm heres a method that allways works for me that my tutor showed me.

concentration of acid x volume of acid concentration of base x volume base
-------------------------------------------------- = -----------------------------------------
Number of moles of acid number of moles of base


Or in short hand: CA x VA CB x VB
------------ = ----------
Na NB
just get the unknown on its own like you would with a simple maths sum and solve. volume of acid/base should be in litres and number of moles of acid/base is derived from the chemical equation eg (1)HCl + (1)NaOH = NaCl + H20 so number of moles of acid would be 1 and number of moles of base would be 1.

 

[Riviet]

Umm heres a method that allways works for me that my tutor showed me.

concentration of acid x volume of acid concentration of base x volume base
-------------------------------------------------- = -----------------------------------------
Number of moles of acid number of moles of base


Or in short hand: CA x VA CB x VB
------------ = ----------
Na NB
just get the unknown on its own like you would with a simple maths sum and solve. volume of acid/base should be in litres and number of moles of acid/base is derived from the chemical equation eg (1)HCl + (1)NaOH = NaCl + H20 so number of moles of acid would be 1 and number of moles of base would be 1.

It's faster, however if you make a mistake, then you will get no marks for the question, as you're doing it all in one go.

 

[sushi-ness]

hmmz im doing the titration competition this yr and i was given the formula as:



CA x VA
CB = ___________

VB

 

[sushi-ness]

sorry, i guess that didnt turn out good, letz try that again..

The concentration of base =


Concentration of acid x Volume of Acid
_______________________________

Volume of Base


( CB = CA x VA / VB )


OR

The concentration of acid =


Concentraion of Base x Volume of Base
________________________________

Volume of Acid


( CA = CB x VB / VA )


please correct me if im wrong