4-Nitro-O-Phenamine Lab Report

When calcium chloride, sodium bicarbonate, and phenol red are put into a bag and mixed up the type of reaction that occurs is a chemical reaction for the following reasons. Things that indicate that a chemical reaction has occurred are color change, formation of precipitate, formation of gas, and energy transfer in which three of them took place in the reaction of calcium chloride, sodium bicarbonate, and phenol red. The three indicators in this experiment were: a color change, formation of gas, and an energy transfer

Data Table 2 shows the results gathered after the purification of 3-nitrochalcone. Since only half of the crude product was used, the theoretical yield for the crystallized product was determined to be 2.1 g. This led to a percent yield of 39%. The melting point of the crystallized product was also determined to be 142℃, which differed slightly from the literature value of 146℃. As a result, the product, 3-nitrochalcone, was not completely pure. It probably contained water and alcohol, because any impurities would have lowered the melting point. Considering the fact that the crude product was not thoroughly dried before purification, water and ethanol were already in the product. Even after crystallization into “pure 3-nitrochalcone”, the product was also not completely dried. The yield should have been much lower than 39%. If the product is not allowed time to dry, not only water, but methanol, which was the solvent that was used to crystallize the crude, would be in the product. Both the crude and crystallized 3-nitrochalcone were analyzed by infrared spectroscopy to test and prove these

Table 2: Consists of color extract taken from a red cabbage for a natural indicator. The pH reading that was measured by using the pH meter and the result of the pH reading to determine whether the solution was acidic or basic.

Water uptake capacity of NCs enables them to entrap exudates upon contact with suppurating wounds which is desirable for their effectiveness as wound dressings. The increase in size and agglomeration of AgNPs from NC-1 to NC-3 might have resulted in more blockages of pores of CNCs which could be responsible for a decrease in water uptake capacity of NC-2 and NC-3 as compared to NC-1.

During this investigation the question we looked to answer was: what are the identities of the unknown compounds? In an effort to answer the question, our group designed a method in which the relationships between the unknown compounds in plastic bags were compared so that their identities could be determined. The mole (mol) provides a measure of the number of atoms present in the sample of a compound. One mole of an element or compound contains

The N2O and NO fluxes measurements were conducted in 2–28 days intervals during the growing season and 10-30 days intervals during the non-growing season and between 8:00 and 11:00 h each measuring day to minimize the effect of diurnal temperature variation. The stainless steel chamber (40 cm in diameter and 30 cm high) was used for the measurement (Toma and Hatano, 2007). Gas samples were taken from the chambers using a 50 mL syringe. The samples N2O were collected for 0; 15 and 30 minutes and for 0 and 30 minutes for NO samples. N2O was analysed using gas chromatography with ECD (GC-2014 Model, Shimadzu) and NO using NOx Analyser (265 P Model, Kimoto Electric, Osaka, Japan). Gas flux is the gradient of gas concentration in chamber over time. The cumulative gas flux was calculated by

where a plot of ΛM versus √C gives a straight line of an intercept equal (Λ0) and a slope equal to the Onsager constant. In our solutions, the following equilibria are deliberated: M+ + A− ⇆ MA

The reaction is carried out in saturated aqueous ammonium chloride solution. Thus no special drying of solvents, reagents, or glassware is required. The reaction mechanism for this experiment can be seen below (Fig. 2)

The chemical reactions that could be used to store energy are Decomposition Reaction (Invisible Ink) and Reversible Decomposition-- Combination Reaction (Dehydration of Blue Vitriol/ Rehydration of Copper (II) Sulfate). 2. The following reaction is exothermic, Heme-O2 +CO  Heme-CO+ O2 .

Chemical reactions happen in industrial processes, living systems, and chemical laboratories. These reactions are thought to form products during their processes. These reactions are called combustion, synthesis, decomposition, precipitation, single-replacement, double replacement, acid-base, and redox. Combustion is known as burning. It happens when a substance combines with oxygen, which results in the release of large amounts of energy forming heat and light.

In this experiment, the pKa, dissociation constant, of 2-naphthol was determined by measuring the UV-visible absorption spectra of solution of the acid at different pH values.

A chemical reaction is a process that involves rearrangement of the molecular structure of a substance. Once this happens, you will not be able to reverse the chemical change. To observe the factors that affect the reaction, an experiment was performed on CaCO3 to explore the many states of matter. Kinetic theory is the first topic to explore. Kinetic theory is the amount of energy each state has. For example, solids have little kinetic energy and gas has the most. The denser the substance is, the less kinetic energy it has. All matter is made up of atoms and molecules that are continuously in motion. When heat is added, the particles vibrate faster and take up a larger surface area however the mass of the substance stays the same no matter

Distilled water changed the color of copper (II) nitrate into a lighter shade of blue and diluted the solution.

The influence of changing amino acids sequence to the Alkaline Phosphatase (AP) enzyme optimal functions

This lab report identifies gas produced by chemical reactions and tests for oxygen, hydrogen or carbon dioxide.