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

Q: A 500 mg vial of Kefzol needs to be reconstituted to a final concentration of 275 mg/mL. Assuming…

A: Answer.    Given data :----- Kefzol vial concentration  = 500 mg.  Desire concentration of kefzol =…

Q: how does the diameter of the column affect the flow rate of the elution in gel filtration…

A: Introduction Gel Filtration Chromatography IsA Type Of Size Exclusion Chromatography, Which Can Be…

Q: Other than iodine what other titrants can be used to quantify vitamin C? is it iodimetric…

A: Iodine is frequently used as a titrant in iodometric titrations for ascorbic acid or vitamin C. It…

Q: My question is: Could you explain steps? (etc. why do we heat or add chemicals like nacl or ammonium…

A: Casein is the major protein component found in milk. It is generally a phosphoprotein which is…

Q: Of the two principal polymers used in column chromatography and electrophoresis, which one would be…

A: The column chromatography procedure is used to separate a single chemical compound from a mixture.…

Q: How do you prepare a 100mL of 0.1 M phosphate buffer? From the anterior buffer, how do you make…

A: Introduction  When modest amounts of acid or base are given to a solution, the pH does not alter as…

Q: What is Xanthan ? What is the importance of using Xanthan in the emulsion experiment?

A: Biopolymers are polymers, mainly polysaccharides, which are produced by microbes. They are mainly…

Q: What is the purpose of doing the silver nitrate test? Write the chemical equation involved here

A: Introduction:  Silver nitrate is an inorganic compound and its formula is AgNO3 with a molar mass…

Q: Give the principle involved in the ninhydrin test. What is its purpose?

A: The principle involved in the ninhydrin test is that the two molecules of ninhydrin react with the…

Q: how many ml of sterile water injection must be mixed with two 4 ml vials of sterile hypertonic NaCl…

A: Tonicity refers to the ability of a solvent to cause cells to shrink or swell. A semipermeable…

Q: Provide a chemical test/reagent that would differentiate each of the following pairs of compounds.…

A: Asked : Reagent and indication of positive test

Q: Write the protocol for the periodic acid schiff technique

A:

Q: How do you calculate the amount of ammonium sulfate necessary to get a 20% solution?

A: Ammonium sulfate is the most commonly used for protein precipitation in protein purification.

Q: Provide a schematic diagram for the Iodine test methodologies in determining the presence of…

A: Biomolecules are formed inside living organisms. They can be simple or complex depending on the…

Q: Compounds such as the sugar trehalose are used as compatible solutes (i.e., water replacements) in…

A: Compatible solutes are also called osmoprotectants, they are small organic molecules having a…

Q: How to do cellulolytic characterization using a 96-well plate? What is the protocol or procedure to…

A: Cellulolytic action can be measured by an assortment of techniques that have been summed up in…

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: 4 mL of 10% TCA solution was added to 1 mL of serum and after mixing, it was waited for two minutes…

A: Calibration graphs are used to estimate the concentration of unknown sample by plotting it against…

Q: In urea hydrolysis what emd product is specifically being tested for in this test? Is the  final ph…

A: The general formula or urea is NH2CONH2. Urea breakdown requires the enzyme urease. It is primarily…

Q: A water sample contaminated with chloride ion, how can you estimate the sample purity?

A: Water in its pure form is referred to as the universal solvent. It this  form it is tasteless,…

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: Since the development of the calcium chloride transformation procedure, other procedures have been…

A: Bacterial transformation is the transfer of  DNA released from a donor bacterium into the…

Q: Ammonia-containing window cleaners are considered pH-neutral substances true or false?

A: As chemicals are dissolved in water, the pH level of the mixture is either acidic or basic. pH level…

Q: Why did the blank used in experimental procedures contain substrate, buffer and water?

A: A blank or blank determination is an analysis without a sample (Enzyme). Any enzyme assay requires a…

Q: An original sample of water containing 4.20 X 109 CFU/mL was diluted by 4 successive 1/100…

A: Serial dilution is used to find the concentration of bacteria in the sample in case of greater…

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

A: An ionic compound is one that is formed between a metal or metalloid and a non-metal. A Flame test…

Q: Qualitative and Quantitative Tests for Amino Acids and Proteins Complete the table:  Test Reagents…

A: Introduction: Amino acids are biomolecules containing an amino and a carboxyl group with a side…

Q: What is the purpose of using a strong acid in the Seliwanoff’s test

A: Carbohydrates are polyhydroxy aldehydes or ketones or biomolecules that yield polyhydroxy aldehydes…

Q: In detection of urea in urine what are the mechanisms, reactions, possible result and interpretation…

A: Urea is considered to be a waste product synthesized in the body by the oxidation of amino acids…

Q: In the assay of citric acid, what do you think about the nature of solution sample ? a) Before…

A: In the citric acid assay, the concentration of the citric acid is used to determine with the help of…

Q: Discuss the correct laboratory technique in using the centrifuge for qualitative analysis. Give two…

A: In labs, a centrifuge is a vital instrument that isolates diverse parts of a mixture, like fluids…

Q: What is the concentration of a 50% solution after completing three 1:10 serial dilutions?

A: Serial dilution is the process that reduces the concentration of a solution in an organised manner.…

Q: The commercial hydrogenation of vegetable oil often leads to a trans acid. Explain this statement.

A: Fat hydrogenation is the process of combining fat typically vegetable oils with hydrogen in order to…

Q: You have a stock solution of 40% hydrogen peroxide. You need to make several dilutions for a…

A: Dilution of Hydrogen peroxide (H2O2): Dilution of Hydrogen peroxide (H2O2), is carried out by adding…

Q: A carbohydrate sample reacts positively with all test reagents except for Lugol's. The sample could…

A: Carbohydrates are the chief biomolecules which act as energy source. Most of the body cells depend…

Q: how can you determine aluminum, lead and zinc in a specimen using a microchemical technique?

A: Ans. Identifying aluminum, lead, and zinc in a specimen using micro chemical techniques involves a…

Q: Why is necessary to completely grind the beef in an LDH purification experiment?  How do you…

A: Since you have posted multiple questions, we will provide the solutiononly to the first question as…

Q: same test, calculate the concentration of this test ? Concentration of standard

A: Given, Absorbance of urea = 0.335 Absorbance of standard = 0.214 Concentration of standard = 50…

Q: Give three other chemical tests that can be used to characterize lipid samples (can be general or…

A: Concept introduction Lipids are one of the important biomolecules. They are organic substances…

Q: Apple puree was analyzed for petulin by HPLC-MS-MS after SPE clean-up.  The procedure was 10.0g of…

A: This query involves the determination of patulin, a mycotoxin produced by certain molds (e.g.,…

Q: In solubility test, why do we need to put the lipid samples in a direct heat after adding ethanol?

A: In solubility test, why do we need to put the lipid samples in a direct heat after adding ethanol?…

Q: A solution of flycine and a solution of albumin were prepared with the same concentration (g/L). One…

A: The ninhydrin test is a chemical that is used to determine the presence of alpha amino groups in the…

Q: f you diluted 200 uL of your culture into 1800 uL of water what is your dilution factor? (Show your…

A: A dilution factor is a ratio that represents the change in concentration of a solution after it has…