Stoichiometry Of Reaction Lab Report

After placing the aluminum in said beaker, one should gather a stir stick and stir the solution in order to speed up the reaction. One should stir the solution until there are no visible silver pieces of aluminum left in the beaker of what was the copper (II) chloride solution. When there are no visible silver pieces of aluminum left in the beaker, this means that the reaction has occurred. After the reaction has occurred, one needs to separate the products, which are copper and aluminum chloride, from each other in order to see how much copper was able to be produced. Seeing as the products are a solid in the form of copper and a liquid in the form of aluminum chloride, the process of filtration can be used to separate them.

In performing these sets of experiments, in which we would drop a water/water solution onto the surface of a penny, we were trying to test and experiment the bonding qualities of water when made into a solution compared to when the water is pure. When we dropped pure tap water on to a penny, the water, instead of flowing and spreading out, stayed together in a single drop on the penny. We wanted to see how different substances affected this phenomenon. When we formulated our guiding question we made sure to preserve these intents in the language: how do foreign substances influence the bonding quality and strength (to the top of a zinc penny in specific) of water? Since these experiments were conducted in groups, we set up a few roles to

We had to mix baking soda, calcium chloride and water and then as a product we would have rocksalt and calcium carbonate, 2NaHCO₃+CaCl₂===>CaCO₃+CO₂+2NaCl+H₂O. We know that a chemical reaction took place because on the products into reactants equation the elements are equally transfered from one side to the other after the chemical reaction took place. We were given a plastic bag, that way we could do a closed experiment. We had to support that there were endothermic and exothermic reaction and that The Law of Conservation of Mass was present in this

The scientists will conduct the experiment by taking four cups of water one that is just salt mixed with water, another that is just water, a third cup that is just ice water and finally a forth cup that is vinegar and water mixed. After that the scientists will drop one Alka-Seltzer tablet into each cup and see how long it takes for it to completely dissolve. The scientists will conduct these three times for

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.

a. Water boils to produce steam at 100 C (212 F) b. Water produces gas with sodium metal c. Water and oil separate when combined d. Water dissolves sugar 22. In the experiment, students put brine shrimp in water with different concentration of salt and counted the number. Which of the following changes to the experiment will increase confidence in the validity of the result? a. Count the number of dead brine shrimp instead of living brine shrimp b. Add more brine shrimp to the water with the highest salt concentration c.

Then test tubes A and C contained bromine. Test tube A was placed under the light and test tube C was placed in the dark. After the reactions occurred, test tube A was the only test tube that contained a white solid and was vacuum filtered. It was then washed with DCM and the leftover substance was the product. Capillary tubes were then obtained and filled with the solid product.

The heating of the solution caused the reaction to start which decomposed Cu(OH)2 and made the solution colorless and darkened the precipitate. The fourth step was the formation of CuSO4. After the solution was decanted from the precipitate and washed with near boiling water, 6 M H2SO4 was added to the beaker containing Copper (II) Oxide and this caused the precipitate to dissolve and the liquid become clear blue. The last step was the formation of Cu(s). This step recovered Solid elemental copper.

1. What type of macroscopic evidence for chemical change did you observe during this experiment? Give at least three different examples. (15 points)

Exp. 10 - The Chemistry of Natural Waters David Graves 11/10/15 CHEM 111 Section 104 TA: Lai Shi Group Members: Jasmine Graves, Brad Hensler, Peter Hoholick Introduction Experiment 10: The Chemistry of Natural Waters investigates the topic known as water hardness. Hardness is a chemical property of water that evaluates the concentration of dissolved divalent cations such as Ca and Mg, which happen to be the two ions that are tested for in the experiment. Hardness can be measured in multiple ways such as molarity (M) or parts per million (ppm). Since all natural waters contain ion concentrations of dissolved minerals, it is important to known the hardness value because hard water can cause scale formation in industrial

These color changes indicate a chemical change, which show that a reaction had occurred. In the first step when o-vanillin and p-toludine, imine was formed. The color change from green to orange suggests that imine appears as orange colored. In the second step, the addition of sodium borohydride reduced the imine into another derivative, which was yellowish lime color. The solution turned clear when acids and anhydrides was added, which indicated the precipitate were dissolved.

The objective of the sludge lab was to determine how many different pure substances were in the sludge by using the methods and techniques we have learned throughout the year. We had to pick separation methods so we could separate our sludge and then test characteristic properties on our separated liquids and solids. This experiment made us use our knowledge on characteristic properties to pick the ones we should test to help us identify our pure substances. Characteristic properties are properties that help identify a solid or liquid. Each solid or liquid has a certain density, boiling point, solubility, flammability, so if you know what each one is then you can use that information to help you identify your solid or liquid.

Grace Lowe Chem 113-002 24 February 2023 Experiment 10: The Chemistry of Natural Waters Introduction The idea behind this experiment begins with a podcast that discusses how water tastes different, and the co-hosts tasted different waters to see if they could identify what company they came from¹. Instead of identifying the water based on taste, is it possible to identify water based on their hardness and mineral content? This experiment tries to answer that question. Through multiple chemical experiments, the mineral content and water hardness of each unknown sample was found to see if it is possible to identify the different waters. Water hardness is a measurement of the amount of dissolved minerals present in that water².

Introduction: The purpose of this experiment is to demonstrate the different types of chemical reactions, those including Copper. There are different types of chemical reactions. A double displacement reaction is a chemical process involving the exchange of bonds between two reacting chemical species. A a decomposition reaction is the separation of a chemical compound into elements or simpler compounds and the single-displacement reaction is a type of

Q22. Can you give an example of a chemical reaction? Sodium chloride Chlorine is a harmful green gas when it is on it’s on its own and sodium is a highly reactive metal. When they are mixed together they make table salt.