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Kindly help in validating stock solutions calculations

stock solution stocks calculations

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#1 discoveradnan

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Posted 05 January 2016 - 09:08 PM

Hello everyone,

 

As title suggests, kindly assist me in validating attached stock solution calculations, are they correct? 

 

 

 

Thanks and Warm Regards,

Adnan

Attached Files


Edited by discoveradnan, 05 January 2016 - 09:11 PM.


#2 Michael Starr

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Posted 07 February 2016 - 01:28 PM

Hi Adnan.

 

Barring differences in molecular weight from different sources, the Tris-Cl calculations are correct.

 

Under your Tris-Cl/Tween, you say you are adding 0.1% Tween-20. Rather, you are supposed to add pure tween, the amounts you have specified are correct. The final, not the initial, concentration v/v is 0.1% (0.1 mL Tween-20 / 100 mL solution).

 

The 1N NaOH is correct, except under 0.1N NaOH, volume water should be 900 uL.

 

Cheers,

 

Michael







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