Q: what does it mean if a bacteria tested positive for indole
A: Like several biochemical bacterial experiments, the results of the indole test are indicated by a…
Q: Why was sodium carbonate used in the extraction of caffeine from coffee?
A: Sodium carbonate: It is an inorganic compound is also known as soda ash, washing soda, and soda…
Q: What is the relationship of concentration and absorbance based on the table and what are the changes…
A: The concentration of a solute in a solution can be determined spectrophotometrically by passing a…
Q: What is the range of pocket thermometer?
A: They are lightweight digital thermometers. They have a built in pocket clip. It is constructed using…
Q: What is insensible water?
A: Water is one of the most important compound needed for the survival of life on earth.
Q: Why does blood cell become clear in distilled water?
A: There is a semi-permeable membrane which decides the entry and exit of the molecules from the cell,…
Q: Which method is suitable for determining the amount of water in food?
A: The food business relies on moisture content analysis to ensure food shelf life and quality, but…
Q: What are the diseases associated with water?
A: Answer- According to WHO the disease associated with water are following:- 1. Cholera 2. Darrhoia…
Q: What happened when a potato strip placed in distilled water?
A: Osmosis is the movement of of water from area of high concentration to area of low concentration…
Q: what will be the possible results in testing the solubility of oil in the water?
A: Polar or hydrophilic molecules are soluble in water and non-polar or hydrophobic molecules are…
Q: when extracting casein from milk, you accidentally added too much vinegar. what would happen, and…
A: Zwitterion is a neutral or hybrid molecule containing both positive and negative charges within…
Q: What would happen to the pH of your soap if you washed the precipitated soap in twice as much volume…
A: pH is the expression of negative logarithm of hydrogen ion concentration in a solute or solvent. pH…
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 highest pH level?
A: pH can be defined as the scale that is used to specify the acidity or basicity of the aqueous…
Q: What is the isoelectric point of AA? [Select]
A: Isoelectric point (pI) of amino acid: Isoelectric point is the pH at which amino acid shows no…
Q: Calculate pNF concentration in each cuvette using Beer-Lambert’s Law. ε = 18,000 M-1 cm-1; b =…
A: Spectroscopy is the interaction between electromagnetic radiation and matter. If transmittance T…
Q: What does Sodium bicarbonate do in water softening?
A: Sodium carbonate softens hard water. Hard water contains high amount of dissolved calcium and…
Q: By the means of gas stoichiometry, how soaps are created?
A: Soap is made up of animal fat or plant oil, as well as caustic soda. It dislodges dirt from surfaces…
Q: Why potato strip increase in size when placed in distilled water?
A: Osmosis is defined as the movement of water molecules from the higher water potential region to the…
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: What are the types of wax bath?
A: There are many types of therapeutic baths that are prescribed by the physician according to the…
Q: How does the concentration of H+ change when a culturemedium at pH 5 is adjusted to pH 9?
A: pH is the measure of acidity or basicity of a solution. If pH of a solution is 7, then it is…
Q: What should happen when you add magnesium salts to the soap solution and then what happens when you…
A: Soap is a cleansing and emulsifying agent that is made usually by action of alkali on fat or fatty…
Q: Name the process by which raisins get inflated when put in water.
A: Raisin is dried grape which is a component of dry fruits. As it is dried the watery component get…
Q: Why are proteins and amino acids considered to be natural buffers?
A: Buffer is a solution that resists the pH change when an acid or base is added to it. pH is measured…
Q: How did your soap compare to the commercially prepared soap?
A: If we wash oily/ greasy hands with soap then only oil/grease gets removed. In the…
Q: Distinguish between acid and rennet curds.
A: Curdling is the process through which curd is obtained by coagulating milk. The coagulation can be…
Q: What is the functional difference between TAE and TBE buffer?
A: A buffer is a solution capable of withstanding pH changes even when a base or acid solution is…
Q: What is the function of immersion oil?
A: Immersion oils are transparent oils that have specific optical and viscosity characteristics…
Q: What is the reagent used to detect glucose in the ph and temperature experiments? What is its…
A: Presence of Glucose is detected using Benedict's Test, Fehling's Test, and Barfoed's Test. Presence…
Q: If a 0.2g of oil consumed 1ml of sodium thiosulphate, calculate its Iodine value and classify the…
A: Lipids are classified into fats, oil, and wax. Fats are also called triglycerides, where three fatty…
Q: What ions turns litmus red? What ions turns litmus blue?
A: Litmus is defined as a combination of different dyes that are water soluble and are extracted from…
Q: Which of the following is incorrect about waxes?
A: The question is all about the wax that is used in our daily needs like in cosmetics, candles, car…
Q: What is the pH of a cleaning solution with a [H3O*] = 7.4 x
A:
Q: why is the different pH value of tap water and rainwater?
A: pH pH is a scale of measurement, which indicates the nature of a solution (acidic, basic or neutral)…
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 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: What is the detection principle of iodine test for starch
A: The iodine test is a quantitative analysis of carbohydrates to distinguish polysaccharides from…
Q: What made the pepper on water move upon the addition of the dishwashing liquid?
A: Water molecules are composed of two hydrogen molecules covalently bonded to one oxygen molecule.…
Q: what is the chemical formula for cooking oil?
A: Cooking oil consists of a mixture of the different types of the fatty acids added to cook and give…
Q: How to reduce/control selenium pollution?
A: Selenium is a trace element that has emerged as a contaminant of concern in water bodies. The…
Q: How acid rain is formed?
A: Acid deposition or acid rain is a broad term used for any type of precipitation with the acidic…
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: In excess of alkaloidal reagent, did the precipitate formed dissolve or not? What is the evidence…
A: Alkaloid reagents such as tannic acid, potassium iodide, potassium ferrocyanide, or mercuric iodide…
Q: What is the difference between a tincture and an aqueous solution?
A: Given: Explain the difference between a tincture and an aqueous solution
Q: What is the role of indicator in determining if the substance is acid or base? (Note that the…
A: pH indicators are compounds which are natural dye. Those indicate if the solution is acidic or basic…
What is the source of litmus used for measuring pH?
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- Which acid is produced when milk gets sour?If a less concentrated initial solution of socium bicarbonate was used in beaker C, would that solution require more or less bicarbonate to neutralize the acid? Why?If a more concentrated initial solution bicarbonate was used in beaker C, would it require more or less bicarbonate to neutralize the acid? Why?
- Explain the difference in the melting points of the linoleic acid and linolenic acid:The electrode of a pH meter is placed in a sample of urine, and a reading of 7.9 is obtained. Is the sample acidic,basic, or neutral? What is the concentration of H3O+ in the urine sample?What ions turns litmus red? What ions turns litmus blue?