Posted by Sonia on Saturday, October 13, 2012 at 5:51pm.
Is this right?
1. Mass of Sample:
= (mass of total)- (mass of empty tube)
= 25.4886 g - 10.2586 g
= 15.2300 g
2. Mass of X recovered:
= (mass of filter paper/large watch glass + X) - (mass of filter paper/lg. watch glass)
= 23.5899 g - 12.9912 g
= 10.5987 g
3. Mass of Y recovered:
= (mass of filter paper/small watch glass + Y) - (mass of filter paper/sm. watch glass)
= 12.1622 g - 9.4332 g
= 2.7290 g
4. % of X in sample:
= [(mass of X) / (mass of total)] * 100%
= (10.5987 g / 25.4886 g) * 100%
5. % of Y in sample:
= [(mass of Y) / (mass of total)] * 100%
= (2.7290 g / 25.4886 g) * 100%
6. Percent Error:
= [(|accepted value - determined value|) / (accepted value)] * 100%
= [(|.6900 - .416|) / (.6900)] * 100%
= [(|.3100 - .107|) / (.3100)] * 100%
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