25 g of ethyl alcohol is dissolved in 100 ml of water (density = 0.99993 at 20°C). What is the % w/w for the ethyl alcohol in the resulting solution? O10% 20% D-25% D50%

Q: 1. Me H2N OEt MeOH, H* Et 2. xylenes, heat 1. H3O*, heat 2. NH O. Meo OMe p-TSOH, PhH, reflux 3.…

A: 1. Fischer Indole synthesis. 2. Ketal to ketone. Ketone to imine. Imine reduction. 3. O-Bromination,…

Q: A student investigates the enthalpy of solution, ΔHsoln, for two alkali metal halides, KCl and RbCl.…

A: In case of a calorimeter we can relate the heat change of a system to the product of the mass of the…

Q: please help me with my assignment. kindly please make it brief and concise ? thank you ^^ need it…

A: The above is the phase diagram of Water-Alcohol System.

Q: alculate the molar mass of 40.0 g of an unknown molecular compound dissolved in 100.0 g water if the…

A: The ratio of moles of solute to the mass of solvent in kg is known as molality

Q: How many grams of sucrose (MW = 342.3) will you need to make 1 liter of a 10% w/v sucrose solution?…

A:

Q: Benzene and toluene form an ideal solution. Find the following entities for mixing 100.0 g of…

A:

Q: 5 grams of cereal was crushed and dissolved in 25 mL water and placed in a dialysis bag. This sample…

A:

Q: What volume (mL) of the prepared high alcoholic elixir is needed if the prescription requires 100 mL…

A: Given: Final volume of solution requrired = 100 mL. Final %(v/v) of the alcohol = 65 % And the…

Q: You have an aqueous solution of pyridinium chloride (C6H5N'HCI) and you want to extract it with a…

A: Like dissolved like, polar compounds are soluble in polar solvent and nonpolar ones are soluble in…

Q: A 10 ml of concentrated acetic acid was added in a sufficient quantity of water to make 350 ml of…

A: Since you have asked a question with multiple sub-parts, as per our company guidelines we are…

Q: 2. Calculate the [H*], [S²] and [HS] in a solution prepared by dissolving 0.10 mole of H2S in…

A:

Q: Consider the reaction between salicylic acid and acetic anhydride: (CH3CO)2O(l) + HOC6H4COOH(s) →…

A: The number of moles of salicylic acid is calculated as shown below where m is the mass and M is the…

Q: A. FERMENTATION OF CANE SUGAR 1. In a 500 mL Florence flask, place 50 gms of brown cane sugar and 1…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: About 300 grams of glucose was fermented with 20 grams of yeast inside a fermenting vessel for 2…

A:

Q: 2. Calculate the [H*], [S²] and [HS] in a solution prepared by dissolving 0.10 mole of HS in…

A:

Q: 6. Write True or False and explain your answer. CHCI-Acetone system is an ideal solution.X b. a. The…

A: Exothermic reactions can be defined as the reactions wich involve release of heat energy during…

Q: The solubility of sodium acetate at 20° C is 46.5 g per 100 grams of water. When 50.0 g of sodium…

A:

Q: When 3.00 g of sodium hydroxide (NaOH) was dissolved in 100.00 g of water a value of 11.00oC was…

A: 1.The concentration of a solution expressed in terms of the number of moles of solute per liter of…

Q: V = 127 mL at 273 K; V = ? Ml at 373 K

A: At constant pressure, the volume of the gas increases with an increase in temperature. According to…

Q: The dissolution of CaCl,(s) in water is exothermic, with AHgoln = -81.3 kJ/mol. If you were to…

A: ΔHsol. = -81.3 kJ/mol 1 m solution means 1 mole of CaCl2 in 1 kg of water. Mass of 1 mole of CaCl2 =…

Q: Solubility of solute A, in g/100 mL Solvent Hot Cold Water 2.0 1.0 Ethyl Acetate Diethyl Ether 1.0…

A: The choice of solvent should be such that is dissolve least amount of solute in it such that we can…

Q: Solubility of Compound 1 and Compound 2 - Grams of Compound 1 - Grams of Compound 2 100 75 50 25 20…

A: Given

Q: Determine the mass of sodium chloride required to prepare 300 ml of a Mueller-Hinton broth…

A: Concentration is equal to the ratio of the number of moles to the volume of solution. The unit of…

Q: A student investigates the enthalpy of solution, ΔHsoln, for two alkali metal halides, KCl and RbCl.…

A: GIVEN: Mass of water=100 gmMass of KCl=20 gmSpecific heat capacity of the solution=4.18…

Q: A 25% w/w aqueous phosporic acid solution has been prepared. Molecular weight of phosphoric acid is…

A: Consider the given information is as follows; 25% w/w aqueous phosphoric acid solution Molecular…

Q: Please help me answer the following question. It will be a big help, thank you! *Calculate the %…

A: Given; For question 1st. The mass of CH3OH=22 g. The volume of solution=100 mL=0.1 L For question…

Q: What willl be the Molar concertration of the 306.29  HCl solution prepared from 3 mL of concentrated…

A: To solve this problem we will first calculate mass of HCl . Then number of mole  HCl will be…

Q: A liniment contains 15 % (v/v) of methyl salicylate. How many mL of the liniment can be made from 1…

A: This question can be solved by using the concept of dimensional analysis .  1 pint = 473 ml

Q: How do you prepare 500 ml 5% (v/v) ethanol/water mixture? Select one: a. Adding 25 ml ethanol and…

A: Concentration of solution has been defined in many units like molarity, molality, ppm, m/v %, V/V %.…

Q: coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy that occurs…

A:

Q: 1.Determine the mass of sodium chloride required to prepare 400 ml of a Mueller-Hinton broth…

A:

Q: Chloroform liniment contains 30% (v/v) of chloroform. How many mL of chloroform liniment can be…

A: Chloroform liniment contains 30% (v/v) of chloroform. 1 lb = 454g

Q: 6.30 L of 0.262 M NaOH from the concentrated commercial reagent [50% NaOH (w/w), sp gr 1.525]. Take…

A:

Q: One liter of saturated Mg3(PO4)2 solution contains 2.03 milligrams of the solid at 25 °C. What is…

A: we are required to find the solubility product of magnesium phosphate

Q: Saturated aqueous sodium chloride (d = 1.2 g/mL) is added to the followingmixtures in order to dry…

A: Sodium chloride is dissolved in water while organic compounds are dissolved in methylene chloride.…

Q: 200 ml of 20%(v/v) of methanol mixture contains ---- ml methanol A- 160 B- 20 C- 40

A: The x % w/v means that x g of solute must be added in 100 mL of the solution. However, the x % v/v…

Q: A student determines the molar mass of a liquid unknown by the method used in this experiment. She…

A: A solution is made up of two components i.e. solute and solvent. The total mass of the solution is…

Q: What is the pOH in pure water at 30°C if Kw at this temperature is 1.47•10-14

A: We have to find pOH

Q: In a W52.0ltext{-g}) aqueous solution of methanol, W(\ce(CH_40},W) the mole fraction of methanol is…

A: Given: Mass of methanol = 52.0g mole fraction of methanol =0.120 To find: The mass of each compound

Q: You dissolve 14 g of gv03/2 in water and dilute to 750 mL. What is the molarity of this solution?…

A:

Q: What is the concentration (in atm.) of TCE in the air at 25 C?

A:

Q: Oceanic uptake of carbon dioxide is thus described: CO2 (g) + H2O ⇔ H2CO3, K = [H2CO3]/PCO2 = 3 x…

A: In order to find the pH of ocean water hydrogen ion concentration should be known, pH value  is…

Q: A stock solution of drug G is available 2 points at 10%w/v. You need to dilute this with syrup, in…

A: A stock solution of drug G is 10% (w/v) which means  10 gm of the drug G is dissolved in 100ml of…

Q: 12 g of compound “Y” dissolves in 10 ml of acetone at 25 oC and 0.85 g of the same compound…

A: The impure sample can be purify using the recrystallization technique that involves preparation of…

Q: 4 At 25°C, the density of a 50 % by mass ethanol/water solution is 0.914 g cm. Given that the…

A: Mass density of ethanol - water solution = 0.914 g/cm³ Mass Percent of ethanol = 50% Mass Percent of…

Q: The same student wanted to determine the heat of dissolution for potassium chlorate (KCIO3, MW:…

A: Dissolution is simply the process by which a substance forms a solution in a solvent. Heat of…

Q: An experiment was conducted using KNO3. The table below shows the data obtained after dissolving…

A: Given, 2g in 10ml saturates t 52.5°C 4g in 10ml saturates t 54.7°C 6g in 10ml saturates t 66.7°C 8g…

Q: A solution of sucrose (Ar C = 12, H = 1, and O = 16) is dissolved in 1,000 grams of water and boils…

A: Elevation of boiling point is a colligative property. The rise in the boiling point of a solution…

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.