Lab observations of chemical changes

What is the color, form, and odor of Epsom Salts. This experiment focuses on geology and the identification of a class of minerals called "carbonates.

Then place in a clean test tube and add purified water.

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What is the color, form, and odor of citric acid. As it cools it turns back to a solid. First find the mass of the beaker and write it down. Notice the top part of the pink water has gone clear. The following household items were tested for observation and in support of answering lab question 2: So use extra paper and the protective tile under the paper where you place the silver nitrate.

So your results are not as good as they could be, which is why this lab is options. If nothing happens no white solution formingthen your batch of silver nitrate may be too old. Answer the below questions.

Campers like dry ice to keep food cold because as the dry ice warms up it simply becomes a gas. Silver nitrate development is destructive, so if it is to be used, it must be used after all other methods have been attempted. Chemical Properties and Reactions: The bag bubbled, got cold, and turned from blue to red.

After reviewing, talk through with the students how to complete the chart as they complete the lab stations. Silver nitrate mixed with table salt NaCl was the basis of making photographic paper.

What occurs to the properties of the reactants in a physical reaction. The stain will eventually wear off but it takes awhile. Your kit has a sample of the ribbons used in dye-sublimation printing.

Observations of Chemical Changes

Then place in a clean test tube and add purified water. Take a small amount of the sodium bicarbonate also called sodium hydrogen carbonate from its test tube and place in an empty test tube. Chemical Changes with Calcite Adding an acid to a compound and observing bubbles is a indicator that your compound has the carbonate CO ion.

So silver nitrate is often used to measure the concentration of salt sodium chloride in water samples. Don't use TARE to zero the mass of the beaker because we will need the mass of the beaker later.

Is its weight more, equal, or less than when it started. Take a photo of yourself wearing the goggles in preparation for the next few steps where you are using 0. Students utilize reading, writing, and speaking strategies in order to develop scientific literacy.

Take a picture of the pattern that your dye sublimation sandwich made. These are nitrile gloves that are hypoallergenic. For some stations there will be three or four pieces of evidence that indicate it is a chemical reaction.

This is useful in helping to identify compounds in forensics and geology. It stresses group discussion, discourse and utilizing text references when engaging in argument. If you did this experiment, did you see any evidence of prints after adding silver nitrate and exposing it to UV light sunlight.

So the pH went even higher. Have students look at their Reactant and Product Property Description page and let them note that these descriptions are also included there.

That makes the dough rise and become fluffy. That means there are more OH- ions present. However, there may be some subtle chemical changes occurring. This explains why the phenolphthalein is no longer pink.

Then blow out the flame. Focuses on Skills 4 - 6 of the Chemistry Unit Plan. One compound called silver sulfadiazine is usually used in dressing burns to kill bacteria. Rinse the pipet well before using it on the next household chemical. Observations of Chemical Changes Purpose: The purpose of this experiment is to observe chemical changes in common consumer products to determine if the chemicals are basic, acidic, or remain neutral when mixed with other chemicals.

Chemical and Physical Changes Lab Stations

Essay on Observations of Chemical Changes Words | 6 Pages. Hansen Observations of Chemical Changes 9/10/12 Experiment: To examine the reactions of some common chemicals contained in Consumer products and observe the macroscopic changes these chemicals undergo. Examining reactions of common chemicals contained in consumer products.

Observation in the Chemical Laboratory: Chemical Changes In this experiment you will begin your training in observation in the chemical laboratory. 2. Recording data (measurements and observations) is an absolute must in science.


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Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) B1 AgNO 3 Silver Nitrate NH 4 OH Aqueous Ammonia Observation 1: White, milky color + Absorb in paper towel and expose to sunlight Observation 2: Rusty and dark brown color Y B2 NH 4 OH Aqueous Ammonia CuSO 4 Copper Sulfate Light blue, cloudy color Y Questions A.

Suppose a household product label says it 96%(95). Lab 2. Chemical and Physical Changes Listed below are some examples of actions to cause physical and chemical changes that • the difference between observations and inferences, and • the role of imagination and creativity in science.

Initial Argument.

Chemical and Physical Changes Lab Stations

Jan 29,  · Title: Observations of Chemical Change Purpose: To observe the basic properties of chemical reactions and associate those properties with common items found in the home. Procedure: I mixed different chemicals in my Well Plate in order to determine whether they were a base or acid and how to determine those chemical properties.4/4(1).

Observations of Chemical Changes Lab observations of chemical changes
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Lab 4: Chemical and Physical Changes