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August 31, 2015

Homework Help: Chemistry

Posted by Rachel on Saturday, January 22, 2011 at 1:55pm.

Can someone please check my work?

Calculate the mass of (NH4)2S2O8 needed to prepare 250mL of a 0.100M solution.
I got 5.705 g.

Calculate the volume of 2.00M KI needed to prepare 250mL of a 0.200M solution.
I got 0.025L or 25mL.

Calculate the volume of 0.100M Na2S2O3 needed to prepare 250mL of a 0.0100M solution.
I got 0.025L or 25mL.

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