The purpose for this experiment was to determine why it was not possible to obtain a high percent yield when Calcium Nitrate Ca(〖NO_3)〗_2 with a concentration of 0.101 M was mixed with Potassium Iodate KIO_3 with concentration of 0.100 M at varying volumes yielding Calcium Iodate precipitate and Potassium Nitrate. Filtration was used to filter the precipitates of the solutions. The percent yield for solution 1 was 87.7%, and the percent yield for solution 2 was 70.8%. It was not possible to obtain a high percent yield because Calcium Iodate is not completely soluble and some of the precipitates might have been rinsed back to the filtrates when ethanol was used to remove water molecules in the precipitate.
Experimental:
Two solutions were prepared by using Calcium Nitrate Ca(〖NO_3)〗_2 with concentration of 0.101 M, Potassium Iodate KIO_3 with concentration of 0.100 M, and deionized water. First solution contained 25.0 mL of Calcium Nitrate and 25.0 mL of Potassium Iodate. In the second solution, 15.0 mL of deionized water were added with 10.0 mL Calcium Nitrate and 25.0 mL of Potassium Iodate. Each of these solutions was mixed for 15 minutes. After the reaction of the solutions took place, each of the solutions was filtered. To remove water liquid from the filtered solution, both of the precipitates in the
…show more content…
Then, an amount of KI (solid) about a size that would fit on a match head was dissolved in 0.05 of Potassium Iodate solution and about 1 mL of water and 1 mL of 1 M HCl were added, which exhibited a weak positive test for IO_3^- (aq). After the weak positive test, an amount of KI (solid) about a size that would fit on a match head was dissolved in about 1 mL of water and 1 mL of 1 M HCl, which exhibited a negative
The purpose for this lab was to use aluminum from a soda can to form a chemical compound known as hydrated potassium aluminum sulfate. In the lab aluminum waste were dissolved in KOH or potassium sulfide to form a complex alum. The solution was then filtered through gravity filtration to remove any solid material. 25 mLs of sulfuric acid was then added while gently boiling the solution resulting in crystals forming after cooling in an ice bath. The product was then collected and filter through vacuum filtration. Lastly, crystals were collected and weighed on a scale.
Data table 1 Well plate Contents Glucose concentration A 3 drops 5% sucrose + 3 drops distilled water Negative B 3 drops milk+3 drops distilled water Negative C 3 drops 5% sucrose +3 drops lactase Negative D 3 drops milk +3 drops lactase 15+ E 3 drops 20% glucose +3 drops distilled water 110 ++ Questions B. In this exercise, five reactions were performed. Of those reactions, two were negative controls and one was a positive control.
At this point the identity of the unknown compound was hypothesized to be calcium nitrate. In order to test this hypothesis, both the unknown compound and known compound were reacted with five different compounds and the results of those reactions were compared. It was important to compare the known and unknown compounds quantitatively as well to ensure that they were indeed the same compound. This was accomplished by reacting them both with a third compound which would produce an insoluble salt that could be filte...
Safely Warning: Do not taste any substance in this activity. Iodine solution and some powders are hazardous...
In our experiment we utilized the hydrate cobaltous chloride. Hydrates are crystalline compounds in which one or more molecules of water are combined with each unit of a salt. Cobalt (II) chloride hexahydrate is an inorganic compound which is a deep rose color in its hydrated form. As an inducer of
One of the most primitive actions known is the consumption of lactose, (milk), from the mother after birth. Mammals have an innate predisposition towards this consumption, as it is their main source of energy. Most mammals lose the ability to digest lactose shortly after their birth. The ability to digest lactose is determined by the presence of an enzyme called lactase, which is found in the lining of the small intestine. An enzyme is a small molecule or group of molecules that act as a catalyst (catalyst being defined as a molecule that binds to the original reactant and lowers the amount of energy needed to break apart the original molecule to obtain energy) in breaking apart the lactose molecule. In mammals, the lactase enzyme is present
Due to the Water Pollution Control Act of 1970, there are stringent standards that need to be considered when depositing wastewater from the process. It was not possible to show the path that the wastewater would take after leaving the system, however, the pollution standards were considered. The water that was produced in the reaction were present in streams with other components such as CO2, butadiene, and maleic anhydride. Due to this exposure, the separated water will be sent to a waste water treatment plant where it will undergo many steps to ensure that the pollutants have been properly removed (Plant Design Book
Dehydroascorbic acid and iodide ions are produced when ascorbic acid and iodine solution are mixed. Iodine has a brown color in solution whereas iodide
In this lab, lab 4.3 Comparing the Concentrations of Saturated Solutions, we set out to find and compare the solubilities of two solids in water. In addition, we tested if solubility is a characteristic property of a solid in a given liquid. This lab allowed us to test and use a reliable way to measure the solubility of a solid. This lab can be replicated for any solid with the same procedure, thus it gives us a method to calculate solubility. The two solids we tested in this experiment were NaCl (Sodium Chloride) and NaNO3 (Sodium Nitrate).
Calcium is the 20th element of the periodic table. It is a metallic element that is greyish-silver in colour and has the atomic symbol of Ca. It is a group 2 alkaline earth metal and is the 5th most abundant element by mass in earth’s crust. It is also reactive with water and is relatively soft. It is an essential element for organisms, and is major material that is used in the materialisation of teeth, bone and shells. It is also the most abundant metal located within animals.
A precipitation reaction can occur when two ionic compounds react and produce an insoluble solid. A precipitate is the result of this reaction. This experiment demonstrates how different compounds, react with each other; specifically relating to the solubility of the compounds involved. The independent variable, will be the changing of the various chemical solutions that were mixed in order to produce different results. Conversely the dependent variable will be the result of the independent variable, these include the precipitates formed, and the changes that can be observed after the experiment has been conducted. The controlled variable will be the measurement of ten droplets per test tube.
Analyze each fraction by spotting 10 times with capillary tubes on a TLC plate, which is exposed to iodine vapor for 15 minutes.
The two aqueous solutions were mixed separately in order to ensure their complete homogeneous transition. Once each solution is completely dissolved, the aqueous solutions of Ca(NO3)2 and Na2(C2O4) are mixed together to form the precipitate, which produces the Calcium oxalate stone sample. The calcium phosphate stone is synthesized in a corresponding manner. 12.9 grams of Ca(NO3) is mixed with 75mL of DI water to form the first aqueous solution.
The reason for collecting the water sample the morning of traveling is to preserve the water sample, the fresher the sample the more accurate the results and the sterilized bottle ensures that the sample is not contaminated. The microbiological, physical and chemical parameters such as; Alkalinity, Appearance, Calcium, Chloride (soluble), Colour, Combined Nitrate & Nitrite Ratio, Conductivity @ 25°C, E. coli, Fluoride , Iron, Total hardness , Heterotrophic Plate Counts @ 37°C, Potassium, Magnesium, Manganese, Sodium, Nitrite (soluble), Nitrate (soluble), Odour, pH, Sulphate (soluble), Total organic carbon, Total Coliforms and Turbidity were measured and tested against SANS 241: 2015 (Umgeni Waters, 2017). Due to lack of equipment the turbidity Cl2 and pH could not be tested on site,
This is the first reaction in the Harcourt Essen experiment. The iodine is oxidised to produce I2 wh...