Titration Calculation of Unknown Solution

[xkieth]

Homework Statement

I titrated an unknown sample with a Sodium Hydroxide 250cm3 with 0.1M Concentration. I titrate and used up 17 cm3 using a Hydrochloric Acid to neutralise the NaOH. I have to find out the Mole of the unknown substance

Homework Equations

I forgot the equations of titration, all I can find on the internet I can't understand them.. >.<

The Attempt at a Solution

I used the 0.1 mol dm-3 NaOH and got 19.3cm3 HCl , that would be equal to 0.83 M,

 

[wolfspirit]

i find the easiest way of remembering the equation is to think of a triangle:
mol
concentration * volume

so mol = concentration * volume
concentration = mol/volume
volume = mol/concentration

 

[Borek]

Triangle is not a way of solving the problem, it is a way of obfuscating the algebra with mnemonics.

Try this page:

http://www.titrations.info/titration-calculation