As part of your classwork assessment, you are required to write an assignment on dry chemistry techniques. The Point to be covered: 1 - Definition of dry chemistry 2 - Principles of Dry Chemistry 3 - Comparison with wet chemistry methods. 4 - Advantages and limitations of dry chemistry techniques. 5- Description of the components of dry chemistry test strips or cartridges. Functionality of each component, including sample application pad, reagent layer, reaction matrix, and detection system. 6 - Analytical Applications. 7 - the quality control of dry chemistry systems
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- 1.) What are the 2 branches of analytical chemistry? 2.) Explain Qualitative Chemistry and Quantitative Chemistry . 3.) What are the examples of Qualitative Chemistry? 4.)What are the examples of Quantitative Chemistry? 5.) Define and explain the feedback system. 6.) Give 3 examples of feedback system.True/False Indicate whether the statement is true or false. Write T if the statement is true while F if statement is false on the before each number 4.Assay of acetic acid in vinegar is an example of proximate analysis 5.Example of variable defects are color, clarity, sheen, cleanliness, smoothness, taste, and presence or absence of a characteristic. 6.Liberation of carbon dioxide during acid-alkali titration renders the analyte acidic BAccurately weigh out about 6g copper(ii) sulfate crystals into a weighing boat. Use the copper(ii) sulfate crystals to make up 250cm3 of standardized copper (ii) sulfate solution Pipette 25cm3 of this solution into a conical flask Add 1.5g potassium iodide and swirl thoroughly Titrate this solution with standard 0.1 moldm-3 Na2S2O3 in a burette. When the iodine color fades, add 1 cm3 starch indicator. Use your titration data below to calculate the percentage by mass of copper in the copper(ii) sulfate crystals.
- 20. How does the operator control digestion time in an aerobic digester? 1. By controlling degree of sludge thickening before digestionmoon als sis and 2. By measuring out the amount of polymer added how 3. By automatically controlling when the tank s and closes through valves and the SCADA system opens 4. By controlling sludge blanket depth and thicknessliquid-liquid extraction(LLE)PrinciplesA river water sample (250 mL) is filtered and 0.032 g of solid is collected on the filter paper. Determine the total solids in the river water sample, in ppm. Density of water sample: 1.01 g/mL O A 31.7 ppm OB.3.17 ppm. OC 317 ppm OD.3170 ppm Clear my choice: Next page
- Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. 27.Quality control department maintain and store records that represent the history of batch from start to finish a. Quality Coordinating office b. Analytical Laboratory d. Material Inspection Section e. Biological Testing Laboratory C. Specification & Analyrtical Development section 28. Which of the following cannot be assay by direct titration with standard base? Citric acid in calamansi juice a. Magnesium hydroxide in Milk of Magnesia C. Acetic acid in vinegar b. d. Diluted phosphoric acid 29. This is used for quantitative preparation of a standard solution: a. Pipet C. Volumetric flask b. Graduated cylinder d. BuretGive the advantages and disadvantages of sequential injection analyzers compared to traditional flow Injection analyzers.Reacción precipitada 2. _____(NH4)2SO4 (ac) + _____ NiCl2 (ac) ---> _____NH4Cl ( ) + _____NiSO4 ( ). Please type answer note write by hend.
- Instructions. Carefully review the Constant-Volume Standard Addition material (pages 7 - 13) of the CHEM 146 Lab 2 Manual given its central importance (especially the fully worked example on pages 11 - 13). In this online activity, you are processing and analyzing raw FAAS data identical to what you would obtain in lab. FAAS Lead Analysis by Constant-Volume Standard Addition. Assume we wish to find the Lead (Pb) concentration in ppb for a lake water sample (the "unknown"). Using a pipette, 10.00 mL of lake water is loaded into five 50 mL volumetric flasks. Next, exactly 0.00, 5.00, 10.00, 15.00 and 20.00 mL of standard lead solution at 4.96 ppb (parts per billion) is added. After dilution to the volume, FAAS readings at λ = 283 nm are taken of the five solutions. The resulting absorbance values are presented below. Table 2-1. FAAS Lake Water Sample Lead Analysis. FAAS Absorbance Readings for Lead Standard Volume Additions Absorbance at 283 nm; A283 Vs (ml) S 0.00 5.00 10.00 15.00 20.00…With solution pls.Procedure 1. To 5 ml of permanent hard water, add 2 ml of sodium bicarbonate, NaHCO3, solution. Filter. To the filtrate, add soap solution. Write the reaction involved. 2. To 5 ml of permanent hard water, add 1 ml of soap solution. Compare the results obtained from procedures 1 and 2. Compare the amount of bubbles and precipitate formed. 3. Boil 5 ml of temporary hard water and add 1 mL soap solution. 4. To 5 ml of temporary hard water, add 1 ml soap solution. Compare the results obtained from procedures IIl and IV. Compare the amount of bubbles and precipitate formed. Question 1. What is the precipitate formed from the reaction of permanent hard water with sodium carbonate? Write the balanced chemical reaction involved.