Background: The Chemical Baggies Lab demonstrated to students how certain chemicals cause diverse chemical or physical changes depending on what substances were mixed together in a designed controlled experiment. During the process of this experiment, almost identical observations were made about different combinations of chemicals that had at least one substance in common. For example, the frequent observation that was made throughout the experiment was that heat was felt. Even though there were distinct chemical combinations, there was one substance that generated a certain observation or characteristic, such as a mixture has to comprise of the phenol red for there to be a color change, which was learned from this lab. Also, calcium chloride …show more content…
After these two substances, the one measure teaspoon of calcium chloride and sodium bicarbonate, are in opposing corners of the baggie, measure five milliliters phenol red solution using the pipet and place the baggie flat on a horizontal surface. Then, a hand must be placed parallel to the “zipping part” of the baggie, creating a blockade off the substances but leaving the part with the ziploc open and accessible. Slightly angling the part of the baggie where it can be sealed upwards and keeping the hand firm on the bag as a blockade, slowly pour the five mL of phenol red solution into the baggie while not moving the hand, which is blocking the liquid from making contact with the substances. Tightly zip and seal the bag shut and carefully mix the three substance thoroughly. Using the five sense, record any observations, such as sound, sight, smell, taste, and touch. Repeat steps 1-8 replacing the chemical substances that were mixed together in the first baggie with one teaspoon of calcium chloride, ½ a teaspoon of sodium bicarbonate, and five mL of tap water (obtained with the 100 mL …show more content…
The chemicals that should be mixed together include: 1 teaspoon of calcium chloride, ½ teaspoon of sodium bicarbonate, and 5 milliliters of tap water. Heat was felt. The color of the liquid was a pasty white, and there was white foam that began to form. The foam began to spread out and then it shrank. The combination of substances maintained the state of a liquid. There was a fizzing noise after the chemicals were mixed. No recognizable odor given off. These substances mixed together caused a chemical change. The chemicals that should be mixed together include: 1 teaspoon of calcium chloride and ½ teaspoon of sodium bicarbonate. The solid was chalky white and felt powdery. There were small chunks, about the size of a carpenter ant, found within the powder. The combination of substances maintained the state of a liquid. There were no noticeable changes occurring. No audible sound. No recognizable odor given off. These substances mixed together caused a physical change. The chemicals that should be mixed together include: 1 teaspoon of calcium chloride and 5 milliliters of phenol red
Add hydrochloric acid to the household product, and if the chemicals began to bubble, once mixed together, then this would indicate that sodium bicarbonate is present.
In the last test, we had to test out a mystery powder (powder A, B, C), in its own separate test tube, in order to solve the Sherlock Holmes Mystery. Our group had powder C. When we mixed water in the mystery powder, it did not dissolve. When the litmus paper was put into the test tube it turned blue. When the vinegar was mixed it bubbled/foamed up. When we mixed the iodine solution, there was no reaction and the solution turned to a dark brown/black color. When we mixed in the baking soda there was no reaction and it turned to an even darker color.
In order to show you why these students believe the mystery mixture is a combinations of NaHCO3 & C6H8O7 I will need to show you the mixture’s chemical and physical properties. The NaHCO3 & C6H8O7 mixture is a bright white color, and has a slight airy smell. The claim also has a powdery white substance or the NaHCO3. It also has small white spheres, that resemble the mystery mixture’s, which is probably the C6H8O7. The students have also learned through experimentation that if you leave the
The primary goal of this laboratory is to correctly identify an unknown substance. To achieve this task, one may use various tests that reveal both chemical and physical properties of a substance. By comparing the results of a known substance and the unknown substance, one may eliminate alternative possibilities and more accurately predict the undisclosed compound. Furthermore, by performing these tests, data can be collected and verified regarding chemical and physical properties of the unknown. Understanding the chemical properties of a known substance aids one’s understanding of the unknown based on comparative analysis of the results of the tests.
The class believes that it is C6H8O7 and NaHCO3 because of their physical and chemical properties. The mystery mixture has some chunky parts, along with some
Carefully measure 1 ½ level scoops of citric acid and place it into the corner of the zip lock bag.
Small pockets of the specific liquid, that contains trapped gas, that is then released to the
The litmus turned blue indicating a base was present. When the substance was smelled, ammonia was detected. Since the sample proceeded to glow after heat was removed, it can be concluded that this is an exothermic change. MgO
However, chemically speaking hydrochloric acid and the bleach form a toxic gas when combined. Clorox and with calcium chloride formed a cloudy solution. At the end, it is observed that thymol blue, silver nitrate, and blue food coloring showed more reactivity than the other reagents because it reacted with all the household chemicals. Calcium chloride and hydrochloric acid did not indicate any significant reactive factors with the household chemicals, due to the higher they are on the activity
12. Put a small volume (around 5 cc) of sodium bicarbonate with the soap solution from the prepared cup into one syringe and a small volume of water with soap into the other syringe.
Dissolve the solution completely; transfer 1 ½ tablespoons into a cup 3. Gargle the solution inside your mouth for one minute. 4. Spit the solution back into the cup. (Your own cheek cells are in the solution) 5.
Insert styrofoam comb in one end of the chamber, having a 3 cm separation from the end of the box.
Dissolve 2.5g dried calcium carbonate in 50〖cm〗^3 of (1mol 〖dm〗^(-3)) hydrochloric acid then add distilled water to make it up to 500 〖cm〗^3.
In your order I provided borax. Take your borax and put it in a separate bowl, then mix in 2 tablespoons
Use the measuring cylinder to get 1.5ml water and pour it into a test tube