## Titration Calculation of Unknown Solution

1. The problem statement, all variables and given/known data
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

2. Relevant equations

I forgot the equations of titration, all I can find on the internet I cant understand them.. >.<

3. 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,
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 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
 Admin 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