# Ceramic Fixatives

Topics: Periodic table, Chemistry, Germanium Pages: 3 (676 words) Published: January 13, 2011
Experiment #3: Periodic Law
Lab Station: 10
Group Members:

Data/Analysis:
Densities of Group 14 Elements
Mass of Metal(g)44.9g63.8g14.5g
Vol. of Water(mL)50.0mL50.0mL50.0mL
Vol. of Water + Metal(mL)56.5mL55.7mL56.0mL
Vol. of Metal(mL)56.5mL – 50.0mL = 6.50mL55.7mL – 50.0mL = 5.70mL56.0mL – 50.0mL = 6.00mL Density of Metal(g/mL)44.9g / 6.50mL = 6.9g/mL63.8g / 55.7mL = 11.2g/mL14.5g / 6.00mL = 2.4g/ml AppearanceSilvery

shinyDark gray
Little balls
Dull sheenShiny
Dark gray
Chunky
Period Number563

Solubilities of salts of Group 2 Elements

SO42-CO32-C2O42-CrO42-
Mg2+SISS
Ca2+SIIS
Sr2+IIIS
Ba2+IIII
Unknown # B
Identity of unknown cation: Mg2+ SISS

Percent Error Calculations:
I assumed that the density for carbon was 1.5g/mL and the density o germanium was 6.00g/mL I made these assumptions based on their position on the periodic table and made and educated guess on the general range of their density. % error of Germanium= (6.00 g/mL – 5.46 g/mL) / (6.00g/mL) x 100 = 9.00% error for Ge % error of Carbon= (1.5 g/mL – 1.6 g/mL) / (1.5 g/mL) x 100 = 6.7% error for C

Results/Conclusion Questions:
1.Q: What is the family name of group 2?
A: Alkaline-earth Metals.
2.Q: Describe any relationship you can discern between the solubility of salts containing cations and their position of the elements in the periodic table. A: The relationship I was able to discern was that as you go down the group containing the salts, they become less soluble to the anion solutions. 3.Q: Identify the metal in the unknown solution and describe how you were able to determine its identity. A: The metal was magnesium and we found this out by comparing its results for its insolubility and if it matched data with any of the ones we have already tested. 4.Q: Describe any relationship you can discern between the density of group 14 elements and their...