Wertman+A

Determining the Ksp of Calcium Hydroxide

Step 1: Measure exactly 15 mL of the filtered solution into a 50 mL beaker.

Step 2: Position the sensor in the Ca(OH)2 solution. The pH should be above 7

Step 3: Check the initial volume of the buret. Slowly add the 0.05 M HCl until the pH reaches 7. Record the volume needed to reach a pH of 7.

The Effect of Concentration on Solubility Step 1: add 70mL of distilled water to a clean 100 mL beaker.

Step 2: Without adding any drops, measure the conductivity of the solution.

Step 3: Add 1 Drop of salt solution to the distilled water. Stir to ensure thorough mixing and measure the conductivity. Continue this process, until you have added 8 drops.

Step 4: Repeat the same steps, adding 1 drop portions of solution, measuring conductivity, and entering the total number of drops added for all of the solutions used in the experiment.

Developing The Perfect Fertilizer

Safety First!

Step 1: Adding the stated amount of KNO3 in 5mL of water.

Step 2: Set up a temperature probe for data collection.

Step 3:Check to make sure the water bath is around 90 degrees C.

Step 4: Lower the test tube with the solid KNO3 solution into the water bath and allow it to dissolve. Ft. Kate Bolinsky

Step 5: When the KNO3 is completely dissolved, use the clam to hold up the test tube and look for crystals.

Step 6: At the moment of crystallization, enter the solubility value found in the third column and select ok.

Step 7: Return the tube to the rack and remove the temperature probe. Repeat the process with the other three test tubes remaining.

Virtual Chemistry: Similar to a Real Life? Abby Wertman and Kate Bolinsky







Drinking Water Contamination Kit

The purpose of this lab is to rank five metals in order of most reactive to least reactive.

Data: Iron reacted to Zinc making it higher than Zinc. Zinc reacted to Copper making it higher than Copper. Lead reacted to Zinc making it higher than Zinc, but still below Iron. Aluminum reacted to Copper making it higher than Copper.

Conclusion:
 * **Rank** || **Metal** ||
 * 1 || Iron ||
 * 2 || Lead ||
 * 3 || Zinc ||
 * 4 || Aluminum ||
 * 5 || Copper ||

Determination of a Hydrate The purpose of this experiment is to determine its water of hydration. Data:

Calculations: 4.02g /18.0g/mol= .0223 moles of water

6.84g / 159.609g/mol = .0429 moles of dehydrate

.223 moles of water/ .0429 moles of hydrate= 5.199 moles of hydrate

Conclusions: If we had not heated the sample long enough to remove all the water of hydration, our masses would have been off and we may have concluded on a tetrahydrate instead of our correct answer of a pentahydrate.

I believe that Rex Chapman killed RJ Lange. I came to this conclusion because his footprints were the closest match to the answer that I came up with after plugging the numbers into the formula.