mp4p1+Group+2

Nick, Jeff, Alysia- We all love Rebecca Black's Friday song. YAAAAAAY OMG. SPANISSSSH WAFFLES. April 6/11

Mixtures: Graduated cylinder, test tubes, test tube holder, Zinc Oxide, Copper II Sulfute, Spatula.

Copper II sulfate is harmful if eaten but stable when mixed []

Zinc oxide is safe beacause it is used in sunscreen []

Copper II sulfate does dissolve in water, did not seperate

Zinc oxide does not dissolve in water, seperated.

Suspension - Takes awhile to settle out and collect at the bottom,opaque, and the particales are large. Solution - All the particales seperate, and transparent. A solution and suspension are both mixtures but suspension's particales settle out.

Questions: Does the amount of solute change the appearance of the water?

hypothesis: The more solute that is added, the darker the water will get

IV: same amount of solute

Levels: {10 ML} {15 ML} { 20 ML} { 5 G } { 5 G } { 5 G }

DV: appearance

Contants: grams of solute

Procedure:

1. Measure Kool aid on triple beam balance

2. Measure 10, 15, 20 ML of water into the test tube. reapeat this 3 times

what is the differance between a element and a compound?

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Which of the following does not describe an element?

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How do you seperate iron shavings from saw dust? media type="custom" key="9093012"

Question 13

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[] Calcium Chloride CaCl 2 Used for ice and dust control on roads, its an ionic compound. Soluble in water, exothermic. [] Bromothymol Blue C 27 H 28 Br 2 O 5 S Harmful if swallowed, it may cause irritation to the skin, eyes, and restpritory tract. Changes colors, yellow means it's below 7 PH and it's acidic, greater than 7 PH is blue, green is around neutrual.

[] Sodium Bicarbontate NaHCO 3 Relieves heartburn and indeggestion, also it could make blook less acidic baking soda .

Water- Hydrogen and oxygen H20

__** Chemical Reaction Lab 4/28/11 and 4/29/11 Experiment: **__
Question: Will each substance react chemically with eachother? IV: Combination of compunds DV: If a reaction occurs (gas/solid formation, color change, energy change, and odor.) Hypothesis:Calcium Chloride and Bromothymol blue will have a chemical reaction. Constant: Amount of each substance, Same amount of water, same lab equipment. Procedure: 10 mL of water in test tube mixed with each substance (3grams). Results: Calcium Chloride mixed with water: 29.6 C Temperature incresed a lot. Sodium Bicrobonate mixed with water:19.1 C Temperature decreased. Bromothermal Blue mixed with Calcium Chloride and Sodium Bicrobanate: 21.8 C Temperature went up and then cooled back down. Turned green and bubbled. Bromothermal Blue mixed with Sodium Bicrabonate: 19.2 C Temperature decresed and color change Bromothymal Blue mixed with Calcium Chloride: 26.6 C Tempererature rised.

__**DV**__: Mass of the products (grams)
__**Constants:**__ Mass of the beakers, same glassware will be used. __**Mass of glasswares:**__ Around 81.3 grams __**Mass of reactants (alone):**__ Around 7.4 grams __**Procedure:**__ Place beaker on scale, place two testtubes in the beaker, wiegh the mass, record the mass of the glassware, measure sodium Iodide and Lead Nitrate (in seperate test tubes), record mass of the substances and subtract glassware, flip over test tubes in beaker, record observations. __**Observations:**__ Almost instantly the reactants had a chemical reaction turning into a right yellow/orange. The mass did not change in the first trial. In the second trial the same thing happened. There was a chemical change but the mass did not gain or lose anything. A suspension occurs when the two are mixed. In the third trial the mass stayed the same again. We can conclude that the mass of the reactants stays the same as the products.



__** Lab 5/12/11 & 5/13/11 **__ __** Question: **__ If we have a chemical reaction that forms a gas, how do the reactants and products compare in mass? __**Hypothesis:**__ After the chemical change the mass will increase. __**Procedure:**__ Find mass of everything (including water 10mL), turn cap over with Alkaseltzer and screw the cap quickly, observe the reaction, open up the vile, repeat 3 times. __**Constants:**__ Amount of water, mass of everything. __**IV:**__ Mass of the reactants (grams) __**DV:**__ Mass of the products (grams) __**Observations:**__ The mass of the products had stayed the same after the chemical reaction it had gone through. __** Conclusion: **__ When two reactants have a chemical change that produce a gas the mass did not change. **Mass of products:** 45.3 grams **Mass of vile:** 34.65 grams **Mass of the reactants:**11.38 **Average change in mass:** 0g __**Summary:**__ The Alkaseltzer did not change the mass when mixed with water. The Alkaseltzer bubbled when it was mixed with the water.but it did not change the mass.