Analysis of Phosphate Essay Example for Free

Analysis of Phosphate EssayThe aim of the experiment is to determine the denseness of phosphate ions in un cognise samples. A serial publication of dilution of known concentration is performed from the phosphate working solution. Each of the prepared working standards, the obscure samples and the blank are then made to react with a mixed reagent which turn in been prepared after acid wash of the glasswares Glassware * 2 Beakers * 11 conical flasks * 9 Volumetric flasks 50 ml * 1 Volumetric flasks molar concentration ml * Pipette type 1 Pipette 25 ml * Stir rod * 11cuvette * Spectrophotometer Chemical needs hazards and safety precautions 1. Sulphuric acid It is really hazardous in case of skin contact. It is classified as corrosive, irritant and permeator. prophylactic needs Lab coats,safety goggles and gloves should be worn to minimize endangerment of contact. In case of Eye see Check for and remove any contact lenses. In case of contact, immediately florescence eyes wit h plenty of wet for at least 15minutes. Cold water supply may be used. Get medical attention immediately. Skin ContactIn case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated wearable and shoes. Cover the irritated skin with an emollient. Cold water may be used. Wash clothing before reuse. Thoroughly clean shoes before reuse. Get medical attention immediately. Serious Skin Contact Wash with a disinfectant soap and cover the contaminated skin with an anti-bacterial cream. Seek immediate medical attention. Inhalation If inhaled, remove to fresh air. If not breathing, attain artificial respiration. If breathing is difficult, give oxygen.Get medical attention immediately. 2. ammonium heptimolybdate Ammonium heptimolybdate e is harmful if swallowed or inhaled. It causes irritation to the eyes, skin, and respiratory tract. It affects kidneys and blood Safety measures Lab coats,safety goggles and gloves should be worn to minimi ze risk of contact. 3. Potassium antimonyl tartrate Slightly hazardous in case of ingestion. Non-corrosive for skin. Non-sensitizer for skin. 4. Ascorbic acid Slightly hazardous in case of skin contact (irritant), of eye contact (irritant), of ingestion, of inhalation.Safety measures Lab coats, safety goggles and gloves should be worn to minimize risk of contact. 5. Hydrochloric acid tough hydrochloric acid forms acidic mists. Both the mist and the solution have a corrosive effect on human tissue, with the potential to damage respiratory organs, eyes, skin, and intestines. The HCL should be used in a fume hood and personal protective equipment such as rubber or PVC gloves, protective eye goggles, and chemical-resistant clothing such as lab coats should be used to minimize risk when handling hydrochloric acid.Procedures and calculations. * All of the glasswares to be used are to be washed with acid (HCL) and then with distilled water. * Nine standards, a blank and 2 random sample ar e going to be analysed. * Prepare a series of working standards in the range of 10-500g NO2-N/L * To 50 cm3 of each working standard and sample add 1. 0 cm3 of sulphanilamide, mix and stand for 2 minutes Calculations 1ml = 0. 5 g of NO2- 1000 ml of solution contain = 10 ml of NO2- (100 g) 50 ml of solution contain = 1 ml of NO2- (10 g)SN Volume of standardPHOSPHATE solution (s) Volume ofwater Concentration Absorbance 1. 1. 0 49 10 0. 003 2. 2. 0 45 50 0. 035 3. 3. 0 40 100 0. 058 4. 4. 0 35 150 0. 074 5. 5. 0 30 200 0. 099 Blank 0 50 0 0. 000 Sample A1 0. 022 Sample B1 0. 068 Result A Graph of absorbance (OD) against concentration (g). Using the equation (y=mx+b) to determine concentration of samples. Let Y equal the concentration. This is what will be solved for. Let X equal the absorbency of the sample.This is the absorbency metric by the spectrophotometer Allow to equal the slope and b to equal the y-intercept y= 0. 019 x + 0. 947 Concentration of Sample 1 Absorbance of s ample A1 = 0. 022 y= 0. 019 (0. 022) + 0. 947 = 0. 947 Concentration of unknown sample 2 Absorbance of sample B2 = 0. 068 y= 0. 019 (0. 068) + 0. 947 = 0. 948 Discussion The concentration phosphate ion in of samples D and E were situated In this experiment I determined the concentration of phosphate ion in samples D and E.These values were determined by obtaining data from solutions of known concentration. These solutions were placed in the spectrophotometer and then by plotting a represent of absorbance vs. concentration, an equation was produced from which the unknown concentration were determined Conclusion From the result of the experiment, it was determined that the relationship between concentration and absorbance is linear. The amount of light absorbed by a solution varies directly with solute concentration.