Would you expect the analytical results for ammonia-nitrogen to be higher than, lower than, or the same as the actual value in a sample of domestic wastewater that had been stored for several days prior to analysis without acidification?

Q: What is the relation of A, T and %T? Under Beer Lambert Law crux the concentration.

A: According to the Beer-Lambert law, absorbance is linearly proportional to the concentration of…

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: Explain the Alkali reserve ?

A: Alkali reserve is represented by Plasma bicarbonate . Bicarbonate concentration is significantly…

Q: Before inoculating and pouring molten nutrient agar into a plate, why must the agar first be cooled…

A: Agar or agar-agar is a jelly-like substances obtained from red algae. Agar is a solidifying agent…

Q: How is the COD Values be affected in the presence of the following contaminants in your sample?…

A: COD value means chemical oxygen demand. The COD value indicates  the amount of oxygen which is…

Q: Why should the use of nichrome or iron containing loop/wire be avoided as an inoculating device when…

A: The oxidase is a test used in microbiology to identify bacteria that produce cytochrome c oxidase.…

Q: Why is betadine a good DIY substitute for gram’s iodine or dissolved Potassium iodide which is…

A: Iodine, with the symbol I and the atomic number 53, is a chemical element. At typical conditions, it…

Q: Using DEAE-cellulose as ion exhange resin, indicate the starting and ending pH for the narrowest…

A: Chromatography is a technique for separating different components of a sample, where the analyte is…

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: What is the concentration in PPM  of sodium fluoride in tap water has been fluoridated by the…

A: Concentration describes the amount of substance present in a mixture or solution. In the case of a…

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: Why do some bacteria grow in the presence of salts?

A: Carl woese in 1990, devide living world in three groups or domains Archaea, Bacteria and Eukarya.…

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: Beef extract Peptone Sodium chloride Agar Distilled water 3.0 g 5.0 g 8.0 g 15.0 g 1000 mL

A: Nutrient agar is the most common general-purpose medium, thats supports the growth of the wide range…

Q: Why is immobilization a good strategy for dealing with uraniumpollution?

A: Uranium (U) is a radioactive chemical element of the actinoid series of the periodic number with an…

Q: Plain soaps have what level of germicidal activity?

A: This question is based on action of the plain soap.

Q: give the respective the TOTAL DILUTION FACTOR of respective serial dilutions. show complete…

A: Introduction: A serial dilution is any dilution in which the concentration decreases by the same…

Q: A 2.5mg/ml solution of ampicillin is available for use, what volume would you add to 200ml of LB…

A: Ampicillin is a broad spectrum semi-synthetic derivative of penicillin. It is active against both…

Q: Explain this example of the following water quality serial dilution. Note the dilution factors and…

A: Given information TNTC - Too many to count in plate 1:1 TNTC- in plate 1:10 10 cfu's= 1:100 1 cfu's…

Q: Why do the leaf disks in the baking soda solution (treatment) begin to float?

A: The baking soda solution used in floating disk photosynthesis demonstration.  Release of Oxygen in…

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: If I add 10 microliters of a culture at 106 cells/mL to 990 microliters of nutrientbroth, what is…

A: Microbiology is the branch of science that studies microscopic organisms. As microorganisms are not…

Q: When preparing samples for SDS-PAGE, what is the purpose of boiling the samples at 95°C?

A: Electrophoresis is a laboratory technique used to separate and isolate desired nucleic acid…

Q: why would you perform an indole test?

A: The inside test is a qualitative approach of the biochemical analysis of bacteria that determine…

Q: Wastewater treatment process is endothermic or exothermic?

A: The wastewater treatment process is done in the wastewater treatment plant. It is completed in three…

Q: What happened to the distribution of methylene blue crystals in the beaker water over time? What…

A: Diffusion Diffusion is a process involving the movement of molecules "down the gradient" i.e. from…

Q: Define water activity and briefly describe how it can be determined. Why is it difficult for…

A: The tiny organisms that cannot be observed by unaided eyes are the microorganisms. The microbes…

Q: Salt Treatment Tap Water Treatment Distilled Water Treatment   Which of these experimental…

A: A hypertonic solution contains a higher concentration of solutes compared to another solution.…

Q: How does a nitrate addition prevent sulfide souring ofcrude oil?

A: The presence of a higher concentration of sulfur in crude oil defines the sour crude oil. It is an…

Q: What are two possible reasons for why food safety inspectors often use an overall nitrogen content…

A: The Bradford protein assay is used to measure the concentration of total protein in a sample.…

Q: What happened to the pH when the cola and borax solution was added to the water? Explain

A: Answer.  When the cola was added to the water, the pH of the water went from neutral to acidic even…

Q: Compute the cfu/g (lactic acid bacteria and coliforms) of these samples given the following values…

A: Violet Red Bile Agar- is the medium where the coliforms bacteria grow develop sufficiently. The…

Q: Why do we add powdered zinc to the nitrate reduction test?

A: Bacteria are prokaryotic simple unicellular organisms. Their mode of respiration may be aerobic or…

Q: Compute the cfu/g (lactic acid bacteria and coliforms) of burong mustasa samples given the following…

A: Introduction The colony forming unit (CFU) is a measurement indicating the number of viable…

Q: If I add 10 microliters of a culture at 106 cells/mL to 990 microliters of nutrient broth, what is…

A: Cell density refers to number of cells present per unit volume. It is usually expressed in cells/mL.

Q: Aside from Paraffin, what is your recommended infiltrating medium for routine purposes? why?

A: INFILTRATION is the process in which the clearing agent is completely removed from the tissue and…

Q: Why do we need to place the lipid samples under direct heat after adding ethanol in a solubility…

A: The solubility test determines the presence of all lipids as a preliminary test.

Q: What is the effect of pH in the shelf life of unsterilized media? [Answer in not more than 2…

A: The shelf life of unsterilized media will decrease due to the pH.

Q: A solution of an unknown carbohydrate gave the following optical readings when analyzed by a…

A: A sample mean refers to an average set of data. To calculate the sample mean of a given dataset the…

Q: Other than treated water, what are the final products ofwastewater treatment? How might these end…

A: Wastewater treatment involves multistep process of primary treatment, secondary treatment and…

Q: How does the results of the pH meter and the pH paper compare with each other?

A: pH is the concentration of hydrogen ions present in the given solution. The determination of the pH…

Q: What are the advantages of enhanced biological phosphorusremoval (EBPR) relative to traditional…

A: Wastewater from the laundry, household detergents which contain phosphate, comes under the category…

Q: Is it safe to use 100g of Lye (NaOH) as a disinfectant at homes? Justify your claim by computing the…

A: Disinfectant: A disinfectant is a product that kills harmful microorganisms like bacteria and…

Q: If a more concentrated initial solution bicarbonate was used in beaker C, would it require more or…

A: In a neutralization reaction, number of moles acid and bases are always equal at neutralization…

Q: Could a MacConkey agar plate be used in place of the EMB plate in the Standard Analysis of Water?…

A: MacConkey agar is used as a differential and selective culture medium used in analysis of water…

Q: How has the National Appliance Energy Conservation Act of 1987 helped reduce acid deposition?

A: -It set standards for household appliances, for an example washing machine and dryer. -It also asked…

Q: If the agar instructions say to mix 50 grams of agar in 1 liter of water, how many grams of agar…

A: 1 litre/ 1000 mL needs 50 grams of agar 1 mL needs 50/1000= 0.05 grams of agar 100 mL needs 0.05 X…