McDonoughJ

The Effect of Concentration on Solubility Purpose: The purpose of this lab is to study the effect of increasing the concentration of an ionic compound on conductivity.

this graph that the ion and compounds did do as they said they would, double the slop and increase by 1.5.

Drinking water contamination kit The purpose of this lab is to find which metals are more active then the other metals. data: Zn did react with HCl. Al did react with HCl. Al did not react with CuSo4. Cu did not react with Fe Cl2. Al did react with Pb(NO3)2. Cu did not react with ZnCl2.

Conclusion


 * Rank || Metal ||
 * 1 || HCl ||
 * 2 || Pb(NO3)2 ||
 * 3 || CuSO4 ||
 * 4

5 || FeCl2

ZnCl2 ||

Determination of A Hydrate The purpose of this lab is to test a hygroscopic ionic compound to determine its water of hydration.

The proper chemical formula and name for the compound that we tested is copper sulfate, or CuSO4 Our subsequent calculations would have been affected by having a bigger mass than usual.
 * Compound selected for analysis ||  ||
 * Mass of crucible (g) || 25.1 ||
 * Mass of crucible and hydrated (wet) sample (g) || 30.81 ||
 * Mass of crucible and dehydrated (dry) sample - 1st weighing (g) || 28.78 ||
 * Mass of hydrated (wet) sample (g) || 5.71 ||
 * Mass of crucible and dehydrated sample - 2nd weighing (g) || 28.64 ||
 * Mass of crucible and dehydrated sample - if needed ||  ||
 * Mass of dehydrated sample (g) || 3.68 ||
 * Mass of water evaporated (g) || 2.03 ||



Graph 2 represents alkali metals versus the alkaline earth metals. jade and dana



jade and dana jade and dana

Mendeleev: Predicting the Future?

Purpose: The purpose is to predict the density of undiscovered elements using Germanium based off the other metals found in the same column of the periodic table.


 * Element || Trial || mass (g) || Volume change (mL) || Density (g/mL) || Average Density (g/mL) ||
 * Silicon || 1 || 3.19g || 1.0 mL || 3.2 g/mL ||  ||
 * || 2 || 5.08g || 2.0 mL || 2.5 g/mL || 2.6 g/mL ||
 * || 3 || 6.55g || 3.0 mL || 2.2 g/mL ||  ||
 * Tin || 1 || 9.01g || 1.0 mL || 9.0 g/mL ||  ||
 * || 2 || 14.78g || 2.0 mL || 7.4 g/mL || 7.8 g/mL ||
 * || 3 || 20.64g || 3.0 mL || 6.9 g/mL ||  ||
 * Lead || 1 || 7.47g || 1.0 mL || 7.5 g/mL ||  ||
 * || 2 || 18.14g || 2.0 mL || 9.1 g/mL || 9 g/mL ||
 * || 3 || 31.34g || 3.0 mL || 16.4 g/mL ||  ||

Best Fit Line Equation: y=2.2x-3.8 Correlation : 0.98 predicted density of the period 4 element (germanium): 5
 * Element || Period || Average Density ||
 * Si || 3 || 2.6 g/mL ||
 * Sn || 5 || 7.8 g/mL ||
 * Pb || 6 || 9 g/mL ||

conclusion: We found through calculations that the density of germanium is a 9.1% error. the percent error for silicon is 12%, tin is 6.7% and lead is 21%. if all of these errors were made, the measured amount of water in milileters will decrease with the data being off. If too much silicon was added then a high amount of mililiters would increase, making the data too high.



sier a liar? Can matter really neither be created nor destroyed? purpose: The purpose of this lab is to find if matter can never be created or destroyed during a reaction.

data Data collected before the reaction:
 * Reactants || Mass (g) ||
 * Mass of empty beaker A || 29.3127 g ||
 * Mass of compound placed in beaker A || .7500 g ||
 * Mass of empty beaker B || 28.6138 g ||
 * mass of compound placed in beaker B || 1.212 g ||
 * Total mass of compounds placed in Beaker A & B || 1.9621 g ||
 * Mass of clean filter paper || 0.8801 g ||

Data collected after the water is boiled off and beakers are allowed to cool:
 * Products || Mass (g) ||
 * Mass of beaker A &filter with compound || 33.1103 g ||
 * Mass of compound recovered in beaker A || 3.7976 g ||
 * Mass of beaker B + compound || 30.5070 g ||
 * Mass of recovered compound in beaker B || 30.5070 g ||
 * Total mass of both A&B compounds || 1.8932 g ||

Total Mass of compounds before the reaction: 1.9621 grams Total Mass of compounds after the reaction:5.6908 grams

Conclusion: Our results did not confirm the conservation of mass. The total mass of compounds before the reaction was 1.9621 grams and the mass of compounds after the reaction was 5.6908 grams, which is no where close to equaling each other. The percent error was 192%.

I love Boys :)



The graph shows that they should bring in Penelope Paige because her shoe size is the smaller from the other suspects and she can easily fake having a bigger shoe by smearing her foot from the mud. The bigger the shoe size, the harder it is to fake a smaller shoe size. We figure this out by plugging Penelope's shoe size in for X and subtracting it from 5.0302. The person would have had to have a shoe size between 9 and 11 inches, which makes the person that is guilty is Penelope Paige. All the others suspects shoe size is far much bigger.