Physical Properties Lab

How do you know? It is a chemical change because it turned into a new substance. In addition, Was the mixture a homogeneous or heterogeneous mixture? Explain.

The products were aluminum chloride and copper. A change in properties demonstrates that a chemical reaction occurred. One property that changed was the colors. Initially the aluminum foil was a shiny silver, and the copper chloride was a green-blue liquid. After we placed the aluminum into the copper chloride solution, the liquid clouded up a lot and turned to a light grayish hue.

While the copper was going through the changing process this is related to the Law of Conservation of mass. These are related because we wanted to use the copper as an example to prove whether or not the copper disappeared. The law of conservation of mass states that mass can not be created or destroyed but simply its atoms rearranged to form new substances. In the experiment we started out with copper and when we added more and more chemicals and caused it to change it seemed as if the copper did leave but in fact since we ended up with the same copper it proves that the copper never left. Copper has been through many chemicals and identity changes but it also has changed phases because at first it was a solid

Example 3: When the Epsom salt (MgSO4) was combined with the vinegar (CH3COOH) it had settled at the bottom and did not mix. 2. Which reactions, if any, do you believe showed no evidence of chemical change? Justify your reasoning. (15 points) I believe the baking soda (NaHCO3) and the clear ammonia (NH3) had no reaction because both substances are basic.

When the substance reacted with the solution it turned from its initial color yellow/brown to its final color lilac/violet. The experiment went by easily flowing nicely, although one or two things went wrong, none had any effect on the experiment. It is very important to know what foods are composed of because, knowing what is inside our food is essential for our health. We need to be aware of what things we are consuming and what we should be consuming for our bodies to function properly.

Exercise 1 1. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). Using your results from Data Table 1 as a guide, how would you test this material for the presence of sodium bicarbonate? B BoldI ItalicsU Underline Bulleted list Numbered list Superscript Subscript33 Words

When we placed the aluminum foil in copper chloride, a chemical reaction occurred. Before the reaction took place we had aluminum foil and copper chloride as our reactants. After the reaction happened, the products were aluminum chloride and copper. After the foil was placed in the copper chloride, the color of the aluminum foil had changed from a shiny silver, to a deep red. Also, the color of the copper chloride changed from a light blue to a murky green.

In an experiment, physical changes and chemical changes occur. A physical change changes the visible appearance, without changing the composition of the material, and examples include as boiling, melting, cutting, and dissolving. On the other hand, chemical change changes where a new form of matter is formed and is irreversible, such as rusting, burning, decomposition, and cooking. Although no example of chemical change was given by any source, there is one example of physical change. A physical change with Carmustine is decomposition, according to The Cytotoxics Handbook (Allwood, Stanley, and Wright 282).

2. Which physical properties did you examine in this activity? The physical properties that we examined in this activity were state, colour, texture, clarity, shape, and hardness. We did this by examining each powder with a magnifying class once we placed it on the watch glass.

Introduction During this lab, students observed that not all substances dissolve at the same rate. Many factors involved including the independent and dependent variables affect how distinct substances dissolve. Overall, the chemical reaction, “the amount of reactant that changes the product in a given time”, played an important part in this experiment, when proven how a substance can change into another element by either emitting or absorbing energy. (Tro, 2018).

Weighed 1 gram of NaC2H3O2 and mixed it with ionized water. Boiled 12 mL of 1.0M Acetic Acid added into a beaker containing the sodium carbonate on a hot plate until all the liquid is evaporated

The new mixture that was created was a chemical change because it changed the substance and it now has new

The wax melted first, followed by the salt, and lastly the sugar. The salt not only burned before the sugar, but developed a brown color throughout most of the substance at a faster pace. In the water solubility test, the salt dissolved in the water, as soon as it was properly mixed and the sugar dissolved in the water as well, but was stirred for a longer period of time until it was completely dissolved. The wax did not dissolve in the water, however bits of the substance broke off from the main piece. With this information, the final results included: wax as a nonpolar covalent compound, since the substance melted first and was not soluble in water; salt as a polar covalent compound, since the substance was soluble in water and the second to melt; and sugar as an ionic compound because the substance melted last and was soluble in

Commercial vinegar, Yamaha brand 0.1 mol/dm3, NaOH soloution Phenolpthalein indicator soloution (50.00 ± 0.5 cm3 ) cm3 burrete (250.00 ± 0.5 cm3) volumetric flask a (250 cm3± 0.5 cm3)

Within the first minute, half an inch of water was removed out of the test tube. The errors that occurred in the experiment were not sealing the setup, acids not being kept at room temperature, and human miscalculation. Some ways that could have prevented those errors would have been to check the setup with precision and keep the acids at a room temperature and not below