StumpfA

Drinking Water Contamination Kit Purpose: To determine which metal is more "active" than other metals. Through a series of single replacement reactions, you can rank the highest to lowest metal. Data: AgNO3 + Zn REACTED (this means Zn is higher than Ag) AgNO3 + Cu REACTED (this means Cu is higher) AgNO3 + Al NO REACTION (this means Ag is higher than Al) ZnCl2 + Cu NO REACTION (this means Zn is higher than Cu) FeCl2 + Al NO REACTION (this means Fe is higher than Al) AgNO3 + Fe NO REACTION (this means Ag is higher than Fe) Conclusion: Rank 1.Zn 2.Cu 3.Ag 4.Al 5.Fe

Determination of a Hydrate

1. Purpose- To determine the amount of water in the sample and calculate its water of hydration. 2. Data- Mass of crucible- 18.28g Mass of crucible and hydrated sample- 21.83g Mass of crucible and dehydrated sample (1st weighing)- 20.53g Mass of crucible and hydrated sample- 20.53g Mass of crucible and dehydrated sample (2nd weighing)- 20.53g Mass of dehydrated sample- 2.25g Mass of water evaporated- 1.3g

MOLES OF WATER- 1.3g \ 18.0g/mol = 0.072 mol MOLES OF DEHYDRATE- 2 25g \ 159.609g/mol = 0.014mols MOLES OF HYDRATE- 0.072mols \ 0.014mols = 5.14mols (can be rounded to 5)

3.Conclusion- What is the proper chemical formula and name for the compound? CuSO4. 5H2O, copper (II) sulfate pentahyrdrate If you had not heated the sample long enough to remove all the water of hydration, how would your subsequent calculations have been affected? The mass would be greater.

Graphing Periodic Trends Abby Stumpf and Abby Wertman







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