Base station

Sulphite ion (SO32-) is a weak base, but undergoes some hydrolysis to produce basic solutions. In acidic solution, the equilibria are shifted to form sulfurous acid, resulting in the evolution of SO2 gas. Sulfur dioxide is a colorless gas with a characteristic choking odor. The sulfites of Na+, K+, and NH4+ are soluble in water. Most other sulfites are insoluble in water. However, due to the basic nature of SO32-, all sulfites dissolve in acidic solution. Sulphites may occur in natural waters or…

Mustard oil is a fatty vegetable oil which is obtained from mustard seeds. There are basically three varieties of mustard oil available. The difference between these three varieties lies in the method of extraction, chemical composition and properties. The fatty vegetable mustard oil is extracted by pressing mustard seeds. Mustard oil is obtained by cold compression of the mustard seeds and by infusing this extracted oil with other oils to get the final product. Essential mustard oil is obtained…

3.11.2. Effects of pH The pH is a very important parameter which controls the extent of photoassisted degradation. The effects of pH on degradation of CR were investigated using 15.0 mg of LDH; 1x10-5 M CR solution in the pH range of 4.0 to 11.0, adjusted by addition of either 0.1 M HCl or NaOH. The plot of C/C0 vs. irradiation time of aqueous CR is presented in Fig.12(B). The efficiency of photodegradation of aqueous CR was found to be higher in the acidic medium particularly at pH 4 (~99.7%)…

Lab 14/ Test 6: Determination of Acid Dissociation Constants through Titration Sabrina Tom I.Abstract The two unknown solutions A and E were titrated with NaOH solutions. For each solution, one fast and three slow titrations were done to see where the pH rose exponentially. The unknown solutions A and E were determined to be Pyridinium ion acid and oxalic acid, respectively. II.Theories One significant concept throughout this lab is titrations. A titration is a lab method analyzes a…

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. If the procedure is…

Acid-base chemistry can be used to separate the components of a mixture, if one or more of those components are acidic or basic, based on the solubility of that mixture. Solubility is the ability of a solute to dissolve in a solvent and it’ll usually form a solution. An extraction is when compounds are dissolved from a solid into a solvent or from a solution into another solvent. Solvent-solvent is when nonaqueous solvents and reagents are used to remove an element from an aqueous solution. The…

to it. The term “acid”is derived from the latin term acere, which means sour. (properties of acids and bases) Acids are tested with litmus paper, and turn it red, and destroy the properties of bases. Acids also are able to conduct electric currents. Acids produce hydrogen ions in solutions. (properties of acids and bases) Acids react with metals to form hydrogen gas. When adding an acid to a base, salt and water will be…

(NaOH). The amount of luminol collected was 0.2693 g with the percent yield of 161%. The product of the first reaction was then used to recreate the chemiluminescence experiment by mixing luminol, oxidizing agent (hydrogen peroxide), and base (any hydroxide base). This reaction emitted a blue light along with yielding phthalate salt. The experiment showed the importance of luminol in chemiluminescence and yielded much needed knowledge about reactions and how they…

The purpose of this lab was to identify the amount of salt needed in the water to “flink”, the point at which an object sinks or floats, the golf ball in a salt solution. Flinking occurs when the object is neither sinking or floating, it appears as if it is suspended in the middle of the solution. To flink an object, the object’s density has to have the same as the density of the solution that it is placed into. To achieve the same density of both the salt solution and golf ball, manipulation of…

It is essential for pharmacists to be able to predict the theoretical rate kinetics of pharmaceutical products in order to determine its shelf life. As the shelf life is defined by (t90), which is the availability of greater or equal to 90% of the drug, it is important to discover the rate of degradation of a drug to ensure that the patients receive an adequate dose of the drug. In this experiment, the stability of the active ingredient of Aspro Clear is investigated to identify the rate of…