When conducting a flame test for sodium iodide, is the result positive or negative?

Q: What are the processes of concentrate samples analysis in Uv-visible spectroscopy?

A: UV-visible spectroscopy is a fast and simple technique that finds the analyte concentration of a…

Q: Using Benedict's Test would the substance (saliva + acid + potato chips) test positive or negative?…

A: Benedict's test is used for the identification of reducing sugars such as simple carbohydrates…

Q: What is the result for the yellow tube of Methyl red test? What must the pH be in each tube? What is…

A: Methyl red test This test usually aims to differentiate the facultative anaerobes enteric bacteria.…

Q: what does chroomatography observation mean

A: Column fractionation was developed in the 1890s as a technique of separating the various components…

Q: 11. ● Possible methods for the quantitative determination of sodium bicarbonate for injection are:…

A: We'll answer the first question since the exact one wasn't specified. Please submit a new question…

Q: Explain and define cold gelation.

A: Gelation (gel transition) is the formation of a gel from a system with polymers. Branched polymers…

Q: Wintrobe from Westergren

A: Wintrobe test and Westergren test are both used for ESR. ESR is erythrocyte sedimentation rate. It…

Q: In the determination of crude fiber, why should the sample used be finely grounds and exhausted with…

A: The crude fiber found in our food which is an insoluble carbohydrate remains insoluble in our body…

Q: Why is there a need to filter the alkaline solution after adding the Barium chloride solution?

A: In an aqueous solution, barium chloride acts as a simple salt.  However when dissolved in water, it…

Q: a)Determine the amount of X (in gram) in order to prepare 100 mL of 50 mM stock solution of X. Show…

A: In this question, we are given: a) Molecular weight of X= 225 Molarity of stock solution= 50 mM…

Q: Explain why it is not possible to directly measure RV by spirometry.

A: Residual volume (RV) is the amount of air left in the lungs after expiratory reserve volume (ERV) is…

Q: What is the color result of 1% solution of casein, Albumin, Gelatin in ninhydrin test? Include…

A: Ninhydrin test: Chemical test to detect presence of ammonia, primary/secondary amines, or amino…

Q: What is the purpose for testing a specimen for hydrogen sulfide production?

A: Hydrogen sulfide is produced when a bacterial strain reduces the sulfur compounds.  The specimens…

Q: 4. Lipids can also be detected by a preliminary translucent spot test, also called the paper bag…

A: A translucent spot test is a qualitative assay for the determination of fats and oils. When the…

Q: Distinguish between a sterilant, a disinfectant, and anantiseptic. What is cold sterilization?

A: The human environment is filled with microorganisms. These tiny organisms are found everywhere on…

Q: What is the significance and expected visible result of Test for the Presence of Sugar (Benedict’s…

A: Benedict's test is a test for simple sugars that are reducing in nature. Reducing sugars contain…

Q: Why is it necessary to use immersion oil when the 100X objective is used'

A: Note - we answer one question at a time. Immersion oil is transparent and has specific viscosity and…

Q: Discuss sabin feldman dye test.

A: A Sabin–Feldman dye test is a serologic test for toxoplasmosis diagnosis. Toxoplasma trophozoites…

Q: What is the likely result if you try to use the 100X objective without immersion oil?

A: Introduction :- To prevent any air gaps and light loss owing to refraction (bending of the light)…

Q: omatography with other chromatography

A: Chromatography can be defined  laboratory technique for the sepration  of the mixture. The mixture…

Q: Why is there a need to use acids and boil the sample in maceration?

A: Maceration is a common method of obtaining medicinal plants, it is an extraction process in which…

Q: make the test principle, materials required for the analysis, sample preparation, test procedure,…

A: A variety of organic compounds exist in nature. Among them, the nitrogen-containing organic…

Q: What is the purpose of the sodium thiosulphate in the testing of treated water?

A: Testing of wastewater and treated water both demand a standardized process to be followed to obtain…

Q: What is the difference between an antiseptic and a disinfectant? Can the same chemical be used for…

A: Antiseptic Disinfectant 1.       These can slow down the growth as well as can kill the…

Q: Write down the materials , reagents ,instruments,  principle and procedure for Grocott’s hexamine…

A: The Grocott's hexamine silver stain is used to demonstrate fungi. It is a part of histopathology…

Q: what is oil immersion and why is it used

A: Light microscope is a microscopic instrument which uses visible light and magnifying lens to to view…

Q: Chlorides and Test for the Presence of Phosphates

A: Phosphate is a type of charged particle which consist of phosphorus element. A phosphate test…

Q: In a tabulated form, list down the advantages and disadvantages of "each" preservatives used in a…

A: A chemical agent added with any products in order to prevent decomposition through undesirable…

Q: Which of these two, Olive oil and beef tallow would be the identity of the sample in the picture:

A: Olive oil: It is composed of mainly mixed triglyceride esters. The esters are mainly of oleic acid,…

Q: In tabular form, provide the principle behind the reaction provided by each pad on a 10-parameter…

A: Dipsticks are sticks on which several reagents are fixed. Dipsticks are useful as an indicator of…

Q: Explain iodine test for the presence of starch.

A: Starch is a carbohydrate that is composed of glucose and found as storage form of food in plants.…

Q: Actual resut or product Name of test Test compound Reagents used Formaidehyde Benzaidehyde Tollen's…

A: The chemical group that consists of a carbonyl-carbon atom and a carbonyl-oxygen atom that are…

Q: What special precautions must be taken when using the oil immersion (100x) objective?

A: Using oil immersion reduces the air gap between the glass slide and the objective lens. This air gap…

Q: Chemical formula of the precipitate or positive result of the following: 1. Biuret test 2.…

A: Biuret test, also known as Piotrowski's test, is a chemical test used for detecting the presence of…

Q: What is moisture content of test results.

A: Moisture content is represented in short form as MC. It can be calculated by a formula. It provides…

Q: In UV/Visible spectrophotometer analysis for a multicomponent system, there are only two dyes used…

A: UV/Visible Spectrophotometry detects the absorbance of light in the UV/Visible range of the…