A possible chemical reason that this experiment yielded less than 100% cyclohexanone was due to the spontaneous decomposition of sodium hypochlorite, 2NaOCl = 2NaCl + O2, which decreased the amount of reactant present in the initial reaction when hypochlorous acid was formed, which was the oxidizing agent required to oxidize cyclohexanol into cyclohexanone. Sodium hypochlorite decomposed into O2 and NaCl due to a multitude of factors such as exposure to high temperatures, prolonged storage time or sunlight exposure. If a large enough quantity of the sodium hypochlorite was decomposed to limit the reaction that produced hypochlorous acid, the quantity of cyclohexanone produced may be affected. This would have resulted in a decrease in the production…
A graduated cylinder was used to measure 200mL of distilled water into an Erlenmeyer flask and then 40mL of 0.6 M NaOH was added to the distilled water in the flask. The flask was then plugged with a rubber stopper and shook in order to mix the solution. A buret was then washed, rinsed with distilled water, and then 5 mL of the NaOH diluted solution. After the cleansing of the buret, it was then filled up with the NaOH diluted solution. The dilution of the solution was calculated to find the molarity of the NaOH.…
The purpose of this experiment was to observe and measure the effect of an unknown solute on the freezing point of a solvent and to determine the molar mass (molecular weight) of said unknown solute. In the experiment, the solvent, cyclohexane, and the unknown solute “Spongebob” were used throughout the experiment. According to theory as the unknown (nonvolatile) solute was added in the solution the vapor pressure should have decreased. When the vapor pressure decreases the freezing point will decrease along with it in the solution. In the experiment the cooling curves corresponds with that hypothesis.…
R.C. 5.9 Mathematics (Mobile Infant) Activity: “Stack Them Up” Materials: Stacking blocks, nesting cups, measuring cups Infants are continually growing in all areas of development. In this activity, the goal is to get the infant to stack their blocks or cups. The teacher would have the child sit on the floor or at a table with their toys.…
Goals The goal of the lab was to investigate the properties and structure of an unidentified compound that was discovered in a local landfill. The group was called in to help determine the chemical and physical properties of the compound so we can let the people of the town know so it can be taken care of properly with or without further precautions to be taken. Another goal of this project was to devise the synthesis of the unknown compound. Experimental Design In order to determine the correct identity of our unknown compound, we first started with a couple preliminary tests, which include physical state and smell.…
Due to the results of our tests, we are pretty sure that our product is cyclohexene. Our product, cyclohexene, turned clear immediately when Br2 was added to it. Hexane only turned clear after sitting in a bright light for a long time. Cyclohexanol reacted quickly when the Br2 was added; it turned clear immediately. Our cyclohexene had a precipitate form when KMnO4 was added.…
1. a. My data demonstrated the law of conservation of mass in part 5 of the experiment, dissolving sugar in water. The law of conservation mass states that matter cannot be created or destroyed by can enter or leave the system. The system’s change in mass was 0.00 grams, resulting in support of this statement.…
By adding Hydrochloric acid into solid Magnesium, in Data table #2, when Hydrochloric acid was first been added to solid Magnesium, the ribbon immediately start to bubble and producing fumes at the same time with a burning sound. Magnesium start to turn into a white liquid form. After the bubble start to disappear, more Hydrochloric acid was added, and the reactions repeats. Until none of the shiny silver Magnesium ribbon can be seen, and there is no more bubble, the reaction is over.…
Introduction This accuracy lab of titration report experiment will discuss how to find the unknown substance molarity. By using some of the lab equipment to help guide and identify the molarity of the unknown substance. I believe that it will take around three hundred drops of sodium hydroxide (NaOH) for it to be able to reach to its endpoint of the unknown substance. My reason behind my hypothesis is… Methods…
Analysis: A1 vs. E1: Solubility with water (H2O) This test consists of two hydrocarbons, a cyclohexane and a cyclohexene, being added to water to test their solubility. Both the cyclohexane and cyclohexene reacted the same way after the water water was applied.…
However, this temperature was lower than the boiling point of acetone, the most volatile solvent possibly present in the unknown solution, pointing to a source of error in the measurement of the temperature. This could have been due to an inaccurate thermometer or to an error in placing the thermometer too high. Because the boiling point was so low, the more volatile solvent was estimated to be acetone, which has a boiling point of 56.5°C. After fraction A was collected, the temperature of the stillpot was increased and should have produced a steady increase in a plot of the temperature versus total volume distilled while fraction B (a mixture of the two components) was collected, until a second plateau at the boiling point of the less volatile component. The temperature of the stillpot needed to be increased after collecting fraction A because the liquid left in the stillpot was then composed of a higher percentage of the less volatile component, with a correspondingly higher vapor pressure, meaning that it would boil at a higher temperature.…
This lab makes use of the reaction excess powdered calcium carbonate and different concentrations limiting hydrochloric acid in order to determine the effect of changing concentration on the rate of the reaction. Students will carry out 3 trials of 5 experiments each trial. The five different experiments are for the various concentrations of hydrochloric acid (0.2, 0.4, 0.6, 0.8, 1.0 mol/L). First measure out approximately 2 grams of powdered calcium carbonate using a weighing boat and analytical balance. Then, measure out 30 mL of 0.2 M hydrochloric acid into a volumetric flask.…
Introduction Density measures the volume that a given amount of mass takes up. Usually, density has grams per unit volume as a unit. To find the density of an object, the object has to be measured and its mass has to be divided by its volume. Often times, density is used to identify substances, since different elements have specific densities. This experiment is made up of two sections; the first section measures the density of water and the density of an unknown substance.…
In this lab, we carried out a variety of reactions using different chemicals and metals. A chemical reaction is when the chemical state of the substance you are testing rearranges its ionic and molecular structure. One of the reactions we experienced was single replacement, this consists of one ion switching places with another ion to form a new compound. Another reaction we saw was double replacement. In this reaction, two compounds ions are switched to form two new compounds.…
Efficacy of active coated papers incorporating different adsorbents of either activated carbon or zeolite on ethylene adsorptions The suitable formula of active coating solution in the section 4.2 was selected from which provided the highest PIRG and spore germinations of mango anthracnose fungi. From the section 4.2, experimental results indicated that VCC 1.0 was the suitable active coating solution, due to its inhibitory effect and solubility. In this study, VCC 1.0 was used for preparing active coated papers incorporating different types and amounts of the ethylene adsorbent. Two different types of ethylene adsorbents including zeolite and activated carbon were individually added into the VCC 1.0 and homogeneously mixed to obtain various adsorbent concentrations (0.1,…