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### Topic: Calculate the mass of KHP in an impure sample  (Read 553 times)

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#### dude123

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##### Calculate the mass of KHP in an impure sample
« on: June 02, 2019, 02:52:12 AM »
If an impure KHP was in a solution, lets say 25ml and poured into a volumetric flask and filled to the 100ml mark with water. Then titrated against a 0.05M NaOH solution. For example, if it took 35ml to hit end point.
How would I calculate the actual mass of KHP in the initial impure KHP solution. I'm struggling to figure out the moles of KHP in the impure solution. Can you please outline the whole calculation though, thank you.

#### Borek

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##### Re: Calculate the mass of KHP in an impure sample
« Reply #1 on: June 02, 2019, 03:37:03 AM »
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

#### dude123

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##### Re: Calculate the mass of KHP in an impure sample
« Reply #2 on: June 02, 2019, 05:34:26 AM »
Would I be right to say C1V1=C2V2? C2 being KHP concentration then n=cxv for the moles of KHP. Then times the moles calculated by 4 to get the original moles of impure KHP (from 25ml to 100ml) then m=nxmw for the g of pure KHP?

• Mr. pH