Flame Test Lab Report

This experiment had water and the amount as a control as well as the size of the metal were also kept same. the This was why the experiment was repeated multiple times on different days. A standard deviation was found for each element when calorimeter constant and specific heat were calculated. Tuesday was the day with the least amount of deviation which meant it was the day with the most precise when calorimeter constants were compared (Table 1).

The purpose of this lab was to be able to use physical characteristics to determine the identity of an unknown compound. The data from this experiment classified aluminum as metallic; ascorbic acid, paraffin, palmitic acid, sucrose, graphite, and water as molecular; sodium chloride as ionic. In order to determine this, 3 tests were conducted. The first test was to test the conductivity of each substance at room temperature. In this test, only graphite and aluminum conducted.

Flame Tests of the Elements Lab 1. According to your observations, which metal ion is present in your unknown samples? Explain your rationale.

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.

Abstract In this experiment the separation of a copper (II) chloride and sodium chloride mixiture was attempted. The main aim was to separate the compounds from eachother while receiving as much of the original mass of both substances as possible - in perfect conditions the original mass will be received after seperation. Many techniques were considered but dissolution, filtration and evaporation proved to be easiest and most reliable in a school environment with school equipment. The copper (II) chloride and sodium chloride mixture was dissolved in a methanol solution and filtered out leaving the sodium chloride behind.

Objective: In this lab, students learned the different methods there is to separate substances from one another. They practiced the process of decantation, extraction, filtration, and sublimation. Introduction: Theory: Before being able to isolate the components in a mixture, the students should’ve become familiar with the physical properties of each of the substances. The students were given an unknown sample which has a combination of three different components.

After reading part of “A Trial by Fire” I found myself wondering more and more about the judicial system. In the piece it talked about the trial of Cameron Todd Willingham and how he had allegedly killed his children by setting his house on fire. With the sloppy work of the fire investigators and lab work done, I began to wonder how many other cases had gone through the same thing and how many other people were wrongly convicted. In the Willingham case, he was found innocent after he had been put to death. That was one person who did nothing wrong and told the truth and still the law was not on his side.

Popular Culture has often depicted Homo Neanderthals as inferior to Anatomically Modern Humans without much scientific evidence backing those claims of how Neanderthals and early humans coexisted. Movies, TV shows and commercials consistently push the same message that Neanderthals were clumsy, unintelligent, and barbaric, which is not the case. Anthropologists in the past have advanced the hypothesis that Neanderthals were an inferior species to make the homo sapiens appear superior and to align their assumptions with already established racial and special prejudice. A good example of these false claims would be the movie “the Quest of Fire.

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

According to the National Fire Protection Association more deaths occur due to smoke inhalation than any other means (see figure 1). Figure 1: Deaths during house fires. When a fire occurs in a home, occupants can quickly be overcome by smoke and unable to reach nearby exits. Planning and practice can help you survive

A flood is a concern for water damage as well as mold problem in your home or business. Luckily, Oahu Extraction provides flood emergency services 24 hours a day and seven days a week, as well as expert services for water damage restoration and mold remediation in Honolulu, HI and the neighboring islands. When you have signs of a mold problem at home, their professionals will administer mold inspection and removal services to help keep you and your family safe. How do you know if you have mold in your home?

- ​A hydrate is a salt that contains water as a part of its crystal structure. The hydrate used in this lab was Copper (ll) Sulfate Pentahydrate. To heat the hydrate in this lab a crucible is needed. A crucible is a heat resistant container used to heat things to high temperatures. In this lab a mole was used to determine the measurements of all substances.

The dissolution of the salt could be reversed by evaporating the water as shown in part one of the experiment, just as evaporating the water could be reversed by adding water as demonstrated in part two of the

In this experiment, the amount of water lost in the 0.99 gram sample of hydrated salt was 0.35 grams, meaning that 35.4% of the salt’s mass was water. The unknown salt’s percent water is closest to that of Copper (II) Sulfate Pentahydrate, or CuSO4 ⋅ 5H2O. The percent error from the accepted percent water in CuSO4 ⋅ 5H2O is 1.67%, since the calculated value came out to be 0.6 less than the accepted value of 36.0%.This lab may have had some issues or sources of error, including the possibility of insufficient heating, meaning that some water may not have evaporated, that the scale was uncalibrated, or that the evaporating dish was still hot while being measured. This would have resulted in convection currents pushing up on the plate and making it seem lighter by lifting it up

Solubility of a Salt Introduction: The solubility of a pure substance in a particular solvent is the quantity of that substance that will dissolve in a given amount of a solvent. Solubility varies with the temperature of the solvent. Thus, solubility must be expressed as quantity of solute per quantity of solvent at a specific temperature. For most ionic solids, especially salts, and water, solubility varies directly with the temperature.