Q: prepare 250ml of 0.10 m NaOH from solid NaOH and water
A: Molarity: The moles of a solute per litre of a solution is called as molarity (M).
Q: Why Do not add more than 2 drops of copper sulfate in Biuret reagent?
A: There are several biochemical tests to identify the presence of protein in a sample. There are tests…
Q: How many ml 2M NaOH would it take to neutralize 20 ml of 0.5M HCI?
A: Given: Concentration of NaOH , M1 = 2 M Volume of NaOH, V1 =? Concentration of HCl, M2 = 0.5 M…
Q: Prepare 200 ml of a 0.125 M stock of NaCl from a 1 M concentrated stock solution of NaCl.
A: An artificial nutrient medium contains nutritional components like sugars, salts, amino acids, etc.…
Q: Why does pure water have maximum water potential?
A: The energy required to transfer an infinitesimal quantity of water from a sample to a reference pool…
Q: What is the turgid in the water?
A: Osmosis is the process by which the solute molecules are transported from higher concentration to…
Q: The column efficiency is constant for a column that uses a cons tant eluent composition. What does…
A: The question is related to chromatography which helps to separates compounds from a mixture of…
Q: Many of the buffers used these days, such asHEPES and PIPES, were developed because they have…
A: A buffer is a solution that prevents the pH of a sample from decreasing or increasing when acids or…
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: Balance the Alka-Seltzer tablet chemical equation and Identify the acid and base in the reaction.
A: Seltzer tablets neutralize excess stomach acid. These tablets dissolve in water when ingested. When…
Q: Why do wines typically have an alcohol concentration of12–13%?
A: Wine is an alcoholic beverage that is made by fermenting the juice of grapes. There are basically…
Q: 50 mL of 5mM NaCl solution from 1 M NaCl solution
A: Dilution is the process by which we decrease the concentration of a solution. This process is vital…
Q: What is the must in wine production? Why is the final concentration of alcohol limited to 17% for…
A: A biochemical reaction converts reactants into products. It may be anabolic or catabolic reactions.…
Q: What is the m/v % concentration of a solution of LiCl with a density of 2.07 g/mL in 40.0 mL of…
A: Given Values: Mass or weight of LiCl = 2.07 grams The volume of the solution = 40 ml The density of…
Q: Why efficascent oil is green liquid?
A: Efficascent oil is a liniment for the treating pains associated with muscles and joints. It is…
Q: Draw the product formed when oleic acid is hydrogenated
A: Oleic acid (C17H33COOH) belongs to class of alkenes. In oleic acid, 17 carbons are attached to 33…
Q: How should you prepare your running buffer?
A: SDS-PAGE is method of separation of protein based on its size. Running buffer of the SDS-PAGE…
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: How many grams of sodium chloride are needed to make 0.60L of 2.3M sodium chloride solution
A: The concentration of a solution is expressed in molarity. Molarity is defined as the number of moles…
Q: You are provided with a stock solution of 80mM ATP .Hpw much of this solution added to how much…
A: Adenosine triphosphate (ATP) is a biomolecule (nucleotide) composed of a ribose sugar, three…
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: How many moles of Na2S2O3 would be required to react completely with 0.450 g of AgBr?
A: As it is given, Na2S2O3 is reacted with the AgBr, the balanced reaction is shown below: 2Na2S2O3 +…
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 percentage of ethyl alcohol by volume in 750 ml grape wine with 93.8 ml ethyl alcohol?
A: The wines are produced from fruit juices that are rich in glucose. The juice is allowed to ferment…
Q: How many milliliters of 0.1M aqueous Sodium Hydroxide solution can be prepared from 10 gm ?of Sodium…
A: The molarity (M) is the amount of a substance dissolved in a certain volume of a solution. It is…
Q: The crude caffeine isolated from tea often has a green tinge. Why?
A: In the isolation of caffeine from tea leaves, the main problem is that the caffeine is not the only…
Q: What kind of buffer would you make with a optimal activity at ph 4.30?
A: A buffer is defined as an aqueous solution that has a mixture of a weak acid and its conjugate base…
Q: Show how to make up 500ml of 0.5M Tris-HCl at pH 8.8
A: Tris-HCl used in buffer preparation to perform various chemical reactions.
Q: How do you prepare 500 mL pH 6 Citric acid/Phosphate buffer in the laboratory. Please explain…
A: A buffer solution is a solution that only changes slightly when an acid or a base is added to it.
Q: Draw the products formed when β-D-galactose is treated with below reagent. NaH + C6H5CH2Cl
A: The products formed when β-D-galactose is treated with NaH and benzyl chloride has to be given.
Q: Which of the following aqueous solutions has the lowest pH: 0.1 M HCl; 0.1 M acetic acid (pKa =…
A: pH is used to specify the acidity or basicity of an aqueous solution. It measures the hydrogen ion…
Q: Given a BSA stock solution of 4mg/mL how would you prepare a 5 mL sample with a final concentration…
A: The following formula is used to find the volume required to prepare a 5 mL sample with a final…
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: Tris NaCl buffer is known as?
A: Tris (with HCl) has a slightly alkaline buffering capacity in the 7–9.2 range. The conjugate acid of…
Q: in order to obtalh organic compouhds from the obtained plant ekstaktin in pure form, it is used…
A: In Order To Obtain Organic Compounds from Plant Ekstaktin in pure form -- Organic Compounds…
Q: What is the charge of ACCFHTYKL at pH=6 O +1 O 0.5 O-1.5 O +1.5
A: Amino acids are the fundamental building blocks of peptides. The net charge on the peptide is…
Q: why should the ethanol/lystate boundary not be distrubed
A: Ethanol lysate boundary is very much important in the case of DNA extraction experiments, where…
Q: Why are emulsions important in food preparation?
A: Emulsion is a solution formed by the mixing of two immiscible liquids. An emulsifier helps to…
Q: the phensuprin solid is first dissolved in ethyl acetate. one solid will be left over-what is it?
A: Phensuprin is the mixture of aspirin or acetyl salicylic acid and sucrose.
Q: Beer’s law is strictly obeyed only in dilute solutions. Why?
A: It is frequently expected that Beer's Law is consistently a direct plot portraying the connection…
Q: Using correct terminology about water activity, explain why making jam is a good way to preserve…
A: As we know most of the microbes thrive well in the presence of water, food, and oxygen. They survive…
Q: carbonic anhydride
A: Carbonic anhydride It is the acidic oxide of carbonic acid. It is colourless, odourless and…
Q: acetate buffer works on fumarase activity but tris-maleate buffer does not
A: Fumarase is an enzyme that catalyzes the reversible conversion of fumarate to malate in the TCA…
Q: How sodium chloride regards acid production in cheese?
A: All Cheese is formed due to lactic acid fermentation of milk which results in coagulation of milk…
Q: Explain the difference in the melting points of the linoleic acid and linolenic acid:
A: The fatty acids are the compounds that are also present in the cell membranes and allow for the…
Q: What will happen to the hard gelatin capsule if dissolved in water and vinegar for under 10 minutes,…
A: Hard gelatin capsules are made up of an animal based protein that is derived from collagen.plant…
Q: What concentration of ethanol is considered optimum for disinfectant? Why not 100%?
A: Disinfectant refers to the chemical agents that destroy or inactivate microorganisms on an inert…
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- Name two alcoholic drinks produced in each of the following ways.(i) by distillation and (ii) without distillation.Why does blood cell become clear in distilled water?You were instructed to add 0.2 ml of kombucha to 9.8 ml of fresh tea, but instead added 2.0 ml of kombucha. What was the intended dilution? What was the actual dilution? Show your calculations.
- If a sample of beeswax is found to have an acid number of 15.5 and saponification value of 71.2, the ester value of the sample is:You should change it to Catechol (ml) 0.2 0.2 0.2 0.2 ml Turnip extract (ml) 0.1 0.1 0.2 Buffer (ml) 1 2 3 4 H₂O₂ (ml) Distilled H2O (ml) 1.7 1.2 1.1 1.1 Total Volume 0.5 0.5 0.5 0.5 0.5 pH 7 pH 7 pH 7 pH 7 0 0.5 0.5 0.5 2.5 2.5 2.5 2.83 mL of a 45 mM stock solution of a substrate is added to 8 mL of water. Calculate the following values. The substrate molecular weight is 125 g/mol. Calculate the following values: Substrate Volume in mL Dilution Factor Substrate number of moles Substrate concentration for the diluted solution in mM Substrate concentration for the diluted solution in mole/L Substrate concentration for the diluted solution in mg/mL