Mp4p3+Group+3



We are the Wild Strawberries! Our names are Courtney, Kim, and Lauren. We all like strawberries ;)

April 6, 2011

Notes on Copper 2 Sulfate:

· Has the chemical formula CuSO4. · Is a salt. · Harmful if inhaled or injected. · Causes dermatitis.

Notes on Zinc Oxide:

· Is an inorganic compound. · Ionic compound · In crystal form. · Realitively soft. · High temperature
 *  Can cause skin problems or cancer

Here are some links with more information [] [] [] []

To test the soluablility of each substance, you could mix them with different substances to see how it reacts and if it dissolves or not.

Experiment: We are going to be doing an experiment where we use different liquids and see if the copper 2 sulfate or zinc oxide are soluable in water.

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= April 12, 2011 ﻿Kool Aid Experiment =

Question: How much solute does it take to make the solvent saturated? Hypothesis: The solvent will be saturated with about 3 grams of solvent. Independent variable: Amount of solute. Dependent Variable: Saturation. Constants: Amount of water, temperature of the water, type of water, and type of solute. Procedure: 1. Measure out 100mL of water in the graduated cylinder. Put aside. 2. Put a piece of pater, folded in half and reopened, on a triple beam balance. Measure the mass of the paper. Set the balance at 0. 3. Measure out 1 gram of Kool Aid on the paper. 4. Place the Kool Aid into the 100mL of water. 5. Stir and see how saturated the water is. 6. Repeat these steps with 2, 3, 4, ect. grams of Kool Aid until the water is saturated.

A video of the experiment will follow...

media type="file" key="Saturation._0001.wmv" width="300" height="300"

We also learned that the less amount of water you have, the less amount of the solvent (Kool Aid) it will take for the water to become saturated. It took 30 grams of Kool Aid for the 10mL of water to become saturated.

Solubility of a Mystery Substance: Our teacher gave us a mystery substance. We had to mix different numbers of grams of it to 10 mL of water in a test tube. We then had to put the test tube into the hot water bath so that the substance would be able to dissolve. Once it was dissolved, we had to quickly put a temperature sensor in the test tube to measure the temperature of the solution. The temperature we had to record was the temperature at which crystals started forming in the solution. Once we got our results, we had to guess based on the graph below which substance we had. IT WAS POTASSIUM NITRATE! (:



= Notes on Compounds!: =

Calcium Chloride -a salt of calcium and chlorine -solid at room temperature -soluable -can cause shortness of breath and coughing -dangerous when heated -dangerous in natural state -colorless and odorless -CaCl2

Sodium Bicarbonate:
-NaHCO3 -It is a white solid. -It is dissolved in bile. -Also called baking soda -Treats acid build up

Bromothylmol Blue -weak acid in solutin -turns yellow as CO2 is added -solid -can indicate whether final solution is either acidic, basic, or neutral -may cause eye and or skin irritaion

=Chemical Reactions Experiment: 4/27/11 =

** 5/10 Lab: **
Chemicals we are using: Sodium Iodide and Lead Nitrate. Question: In a chemical reaction in which a solid precipitate forms, how iwll the mass of the reactancts compare to the mass of the prodducts? Hypothesis: I think the mass of the product will be the same as the mass of the reactants because mass is neither created nor destroyed. Independent Variable: Mass of the reactants (g) Dependent Variable: The mass of the products (g) Constants: -Mass of the glassware / Same glassware. -Same balance.

** Here is a video of our experiment: **
media type="file" key="Movie.wmv" width="300" height="300" Here is a link to our video.

5/13/11 Question: How does the mass of the reactants compare to the product when a gas is formed? Hypothesis: I think the mass will still remain the same because mass can't be created or destroyed. Independent Variable: Mass of the reactants. (g). Dependent Variable: Mass of the products (g) Constants: -Mass of the bottle and cap. -Same Balance. Was our hypothesis supported or disproved? Observations/Summary: Here is a video of the experiment...