wavelength, and creating a calibration curve. Finally, the last goal to finish the project was to determine the amount of phosphoric acid in the cola beverages. The phosphoric acid content
Cyclohexene In order to dehydrate Cyclohexanol it is required that a dehydration agent, in this case phosphoric acid, be added and for the mixture to be distilled with the Cyclohexene being taken off between 343K and 363K. This reaction gives the formula: In order to keep the experiment at a manageable size 0.1 mole of Cyclohexanol was used along with 4cm3 of concentrated Phosphoric acid. 0.1 mole of Cyclohexanol x 100.2 = 10.2 100.2 0.962 = 10.4 cm3 However because the measuring
forming polycarbonates, both used heavily in many materials manufacturing. Aside from its industrial applications, phosgene is still used sparingly in the laboratory despite the many substitutes that have been developed. Its uses range from producing acid
filtered product out of the vacuum funnel, some product was lost, causing our weighed mass of the product to be less than was actually produced in the reaction.. Lastly, while testing the solubility of the product in acid, we did not record the amount of product dissolved in the acids, and so we lost an unknown amount of product in this step as well. All of these losses of product will contribute to a lower percent yield calculation when we weigh the dry sample of the
The preeminent storage form of phosphorus in standard poultry and swine diets is phytic acid. This phytic acid (myo-inositol hexakisphosphate), also designated as phytate phosphate, is estimated to comprise about 70% of the total phosphorus found in cereal grains, oilseeds, legumes, corns and soya beans which are the prime elements in the feeds of poultry and swine (Reddy et al., 1982; Al-Asheh & Duvnjak, 1995; Lan et al., 2002a). It has been reported previously that the total phosphorus within the
the concentration of ascorbic acid would have been 4.27g/L which is closer to the actual value (.360g/L). If an average of 15.00mL pf NaOH were added, the concentration
stainless steel col-umn 25 cm x 4.6 mm packed with spherical end-capped octadecylsilane bonded to porous silica (5µm), with a pore size of 10 µm and carbon loading of 19 per cent • Mobile phase: A. a 0.112 per cent w/v solu-tion of orthophosphoric acid adjusted to pH 7.0 using a 4.2 per cent solution of sodium hydroxide, B. 1 volume of water and 9 volumes of acetonitrile • Flow rate: 1 ml per minute • UV detection: 275 nm • Injection volume:10 µL 23 2. Assay of aceclofenac (IP 2010) • Weigh
electrochemical and environmental studies. Secondly, to show how to use glass electrodes in the determination of ionization constants of weak poly acid through titration of pH. Then, to study the reaction of hydrolysis using glass electrodes. For this experiment, there were two parts which were determination of ionization constants of phosphoric acid in part A and determination of degree and constant of hydrolysis of aniline hydrochloride in part B. To make the electrochemical cell, there were a
Phosphates Phosphates may be created by substituting some or all of the hydrogen of a phosphoric acid by metals. Depending on the number of hydrogen atoms that are replaced, the resulting compound is described as a primary, secondary or tertiary phosphate. Primary and secondary phosphates contain hydrogen and are acid salts. Secondary and tertiary phosphates, with the exception of those of sodium, potassium and ammonium are insoluble in water. Tertiary sodium phosphate is valuable as a detergent
What is acidity and some of its uses? Before I can define acidity I would like to define an acid. An acid is a word originated from an latin word acere meaning sour in English. The general characteristics of acids are 1. They taste sour. 2. They are corrosive to metals 3. They turn litmus paper red 4. They have a PH of 1 to 6. 5. Usually gases or liquids 6. Frequently feel sticky 7. Acids nuetralise bases to form slats and water 8. They react with active metals to form hydrogen 9. React
Acids are substances that, when added to water produce hydrogen ions. Hydrogen Ions are the combination of hydrogen and water molecules. There are many types of acids, which consist of citric, hydrochloric, carbonic, sulfuric, acetic, nitric, phosphoric, and lactic acids. Acids react with zinc, magnesium, and aluminum forming hydrogen. They turn blue litmus paper red. Litmus is used to check for acidity. Acids are sour, react with metals to produce hydrogen gas, and react with carbonates to produce
Phosphates are products formed by the replacement of some or all of the hydrogen of a phosphoric acid by metals. Depending on the number of hydrogen atoms that are replaced, the resulting compound is described as a primary, secondary, or tertiary phosphate. Also known as trisodium phosphate, tertiary sodium phosphate is used as a detergent and water softener. Primary and secondary phosphates contain hydrogen and are acid salts. Phosphates are important to metabolism in both plants and animals. Primary
determine the pKa of a monoprotic weak acid, polyprotic weak acid, as well as, a free amino acid, alanine. Acids and bases were defined by Bronsted-Lowry in 1923, in which acids were described as substances capable of donating a proton and bases are substances capable of accepting a proton (Thompson and Dinh 2009). In addition to defining acids and bases, Bronsted-Lowry further classified acids and bases as being either strong or weak. By definition, a strong acid or base is a substance that is completely
the addition of mall quantities of acid or base. Buffers typically consists of a weak acid and its conjugate base. Buffers play a critical role in biological processes. Because a buffer is a weak acid, it is only partially ionized and in a state of equilibrium. When an acid is added to a buffer, the buffer will minimize the decrease in pH by neutralizing the acid; the conjugate base will react with the proton released by the acid and reform the original weak acid. If a base is added the hydroxide
Rate of Chemical Reaction between Magnesium and Hydrochloric Acid Aim: - ====== I plan to investigate the effect of temperature, to see if it increases or decreases the rate of reaction between magnesium and hydrochloric acid. Prediction: - ============= I predict that as the temperature of the hydrochloric acid increases, the quicker the rate of reaction will be. This is due to the molecules in the hydrochloric acid gaining energy from the heat. Consequently, the molecules
itself. Potassium benzoate and sodium benzoate. “Potassium benzoate (E212), the potassium salt of benzoic acid, is a food preservative that inhibits the growth of mold, yeast and some bacteria.”(Wikipedia March 31, 2016). It is found in mostly acidic
What is a Ph Scale? A pH scale is the measure of acidity or alkalinity of a substance that is water soluble. On a pH scale the substance is rated with a pH value, which is a number from one to fourteen, with seven as the neutral point. If the value of such substance is below seven then this concludes the substance has acidity which increases as the pH value decreases. One on a pH scale is the most acidic. If the pH value is above seven this indicates that the substance contains alkalinity which will
ribbon and hydrochloric acid Aim It is to tell how the reaction between magnesium and hydrochloric acid will be effected if we change the concentration of hydrochloric acid. Introduction In the experiment the magnesium reacts with the hydrochloric acid to create magnesium chloride and hydrogen. The balanced formula for this is: Mg(s) + 2HCL(aq) MgCl2(aq) + H2(g) Magnesium + hydrochloric acid Magnesium Chloride + Hydrogen Magnesium will react with hydrochloric acid, because it is higher in
into 1-methyl-1-cyclohexene, 3-methyl-1-cyclohexene, methylenecyclohexane, and water through the addition of phosphoric acid and sulfuric acid. This was done through distillation where a mixture of 2-methylcyclohexanol, phosphoric acid, and sulfuric acid was distilled for 30 minutes in a reflux apparatus. Sulfuric acid being a strong acid acts as a catalyst in this reaction. Phosphoric acid also acts as a catalyst in this reaction. The distillate was then added to a centrifuge tube along with 1-2
that are covalently bound together. Explanation All forms of life are composed only of biomolecules. For example, humans have skin and hair. The main part of hair is keratin , an agglomeration of proteins which are themselves polymersbuilt from amino acids. Characteristics of Biomolecules: Organic compounds and they have particular shapes and proportions. Chemical properties are determined by functional group and mostly asymmetric. They are composed of small building blocks and have planar structure