A three-component mixture containing AgCl, SiO2, and KBr was provided to you in the lab to isolate. In the first step of the separation, you added deionized water and isolated one component by filtration. In the second step, you added HNO3 to dissolve/extract the second component and separate it by decantation. Which of the three-component (s) was isolated in the first step by filtration as residue? O KBr O AgCl and KBr O Sio2 O AgCl and SIO2 O ABCI O KBr and SIO2
Q: A 25 mL liquid bleach sample is diluted with water to 1000 mL in a bubble gel. 25 mL of the diluted…
A: The balanced chemical reactions are as follows: I- + OCl- + H2O = I2 + Cl- + 2OH- 2 Na2S2O3 + I2 =…
Q: With the knowledge on analytical separation and analyses, outline a suitable analytical separation…
A: Water can be polluted by different natural phenomenon and also man-made activities.This must be…
Q: One litre of aqueous sample containing the organic pollutant, polychlorinated biphenyl (PCB), was…
A: A one litre sample of polychlorinated biphenyl sample is extracted with two times each time with 50…
Q: Vhich of the followings is the important feature for choosing a good solvent for any…
A: Recrystallization is the method of purification of solute where the compound of interest is first…
Q: Using the given TLC plate can you describe the results and what does the TCL plate tell about the…
A: To describe the results on TLC plate for purity.
Q: In a similar experiment, the mass of 3 PB tablets was measured to be 3.1177 g. The tablets were…
A:
Q: A 1.000-gram sample of NaOH (39.997 g/mol) which has been exposed to the air for some time (NaOH…
A: In the quantitative analysis, the unknown amount of the substances in the sample is determined by…
Q: 4) How would your calculated value of Kup be affected by errors introduced from the following…
A: Solubility product constant (equilibrium constant, Ksp) designates the attainment of equilibrium…
Q: A large volume of liquid is found to have some insoluble solid present in the bottom of the…
A: Various techniques has been used for the purification of the substances.
Q: A flavor chemist attempted to isolate and identify the major flavor component of a recently…
A: IR : 3500 to 3000 cm-1 is alcohol stretch is not present. Therefore the compound is do not have…
Q: Pesticide residues were found in a lot of oranges; the compound identified was the epoxide of…
A: Given data:
Q: A solvent passes through a chromatography column in 3.87 min, but the solute requires 7.60 min. What…
A: Answer :- 1) Retention factor (k) = 0.964 2) tfraction in mobile phase = 0.51 3) Distribution…
Q: A fish sample was analyzed for crude protein content using the Kjeldahl method. The following data…
A: Solutions- Given data- Moisture content 10.0%Weight of sample 2.15 gNormality of HCl used for…
Q: To determine the soil distribution coefficient (Kd), 10 g of dry soil is spiked with 100 mg of…
A: The distribution coefficient Kd can be calculated using the expression: Kd=Atrazine present in…
Q: A solution composed of 50% ethanol (ETOH), 10% methanol (MEOH), and 40% water (H20) is fed at the…
A: Given: 50% ethanol,10 % methanol and 40 % water assuming no reaction in=outso starting with the…
Q: During the chromatography the solvent may be changed from hexanes/ ethyl acetate (8:2) to hexanes/…
A: Given: Solvent system 1: Hexane/Ethyl acetate (8:2)Solvent system 2: Hexane/Ethyl acetate (4:6)…
Q: An environmental chemist working for the Environmental Protection Agency (EPA) was directed to…
A: Varying amounts of 85.0 ppb (μg/L) Cd2+ standard solution were added to the unknown sample solution.…
Q: e used to determine whether the concentrations of haloacetates in the treated water demonstrate…
A: Here, the DBPR - two levels. The level 1 of DBPR new standards and a treatment technique of enhanced…
Q: 10) What is the purpose of a brine wash (saturated sodium chloride solution) in a liquid/liquid…
A: Liquid / Liquid extraction- It is a separation technique used to separate compounds by using two…
Q: A chemist received different mixtures for analysis with the statement that they contained NaOH,…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…
Q: A brewed coffee sample was subjected to solvent extraction. The cup of coffee measuring 200.0 mL was…
A: The correct option is option (2) 27.1 %
Q: A 100 kg of mixture containing 40 w.% Ethyl glycol in water is contacted with an equal amount of…
A:
Q: Carboxylic acids, including fatty acids and benzoic acids, are often present in both municipal and…
A: As a result of a thorough waste characterization program and preliminary evaluation of the costs…
Q: You obtain an Unknown Sample from the Stockroom. You begin testing the solution through the steps…
A: Pb, Hg and Ag all produce white ppt of PbCl2, Hg2Cl2 and AgCl respectively . But in hot water, PbCl2…
Q: A 2.067 g of macrogol monostearate (average molecular weight 706. 5) was added to a 200 ml flask and…
A: Solution: We know the macrogol monostearate is the ester of stearic acid. Saponification is the…
Q: After the extraction of benzoic acid from 0.5g impure sample, the weight of pure benzoic acid in the…
A: The given data- The weight of the impure sample = 0.5 g The weight of the pure benzoic acid = 0.4 g…
Q: Suppose you have a soil that is made up of 10% organic matter with CEC = 200 cmol/kg, 40% kaolinite…
A: Given: A soil with- 10% organic matter with CEC = 200 cmol/kg 40% kaolinite with CEC = 10 cmol/kg…
Q: You obtain an Unknown Sample from the Stockroom. You begin testing the solution through the steps…
A: The laboratory reaction of the chemical compounds are used to determine the specific properties of…
Q: In a GC run, dodecane was used as test solute for a 30 m x 250 ?m i.d. DB-5 column. The dodecane…
A: Theoritical plate in chromatography is a key parameter of chromatography. It is a index of coloumn…
Q: 0.56 g 1,4‐dimethoxybenzene, 0.9 mL 2‐chloro‐2‐methylpropane, 5 mL nitrobenzene and 0.52 g graphite…
A: The given problem is related to green chemistry. Given: Reactants- Mass of 1,4‐dimethoxybenzene-…
Q: Give the molar concentration of HCl with a specific gravity of 1.18 and has 37.0 % (w/w) purity. (
A: Give the molar concentration of HCl with a specific gravity of 1.18 and has 37.0 % (w/w) purity.
Q: Forty grams of powdered banana pulp was mixed with 80.00 mL of cold Tris-HCl extracting buffer to…
A: 1. The original concentration of standard solution is 2 mg/mL.
Q: • If the unknown is vinegar (Note 1), pipet 25.00 mL into a 250 mL volumetric flask and dilute to…
A: This is acid base titration using phenolphthalein indicator. Vinegar is chemically acetic acid.
Q: An environmental chemist working for the Environmental Protection Agency (EPA) was directed to…
A:
Q: A wet pipette was used to transfer 10.00 mL of 1M HNO3 in the determination of ΔHrxn. [magnitude of…
A: Since you have posted multiple questions, we are entitled to answer the first only.
Q: ▪ A pharmaceutical analyst needs to do quality control of a sodium furosemide solution. The max for…
A: Absorbance = Absorptivity coefficient × Concentration × Path length Path length = 1 cm Absorptivity…
Q: are given a container with Na3PO3 that is reportedly contaminated. You are asked by your supervisor…
A: Since, first three parts of the questions are experimentally based, out of QA scope. Therefore, we…
Q: B. %SO3 determination 1. Dry the soluble sulfate sample at 100°C for 1-2 hours, and cool in…
A: We need to make a schematic diagram for the given procedure.
Q: A student recrystallized some impure benzoic acid and isolated it by filtration. He scraped the…
A: Recrystallization can be defined as the process in which old arrangement of particles in the crystal…
Q: With knowledge in analytical process separation and analysis, outline a suitable analytical…
A: Before the industrial and medical purpose, polluted air must be undergone through various steps of…
Q: 20 Carbamazepine tablets were found to weigh 10.000 g in total. The tablets were ground to a fine…
A: This problem employs unitary method, dilution equation and absorbance equation. Absorbance is…
Q: A simple paper chromatography experiment involved the analysis of the food dyes in lollipop samples.…
A: This can be explained by Retention Factor value.
Q: Red cabbage anthocyanin extraction 1. Weight of red cabbage is 1438 g. What is the volume of…
A: Since you have asked second questions, we will solve the second question only. If you want any…
Q: The percentage purity of a paracetamol sample was determined by a reversed phase HPLC method as…
A: Given: Mass of powder taken = 10.0254 g. Volume of solution A prepared = 1 L Volume of solution A…
Q: method as follows: punty of an ibuprofen sample was determined by a reversed phase HPLC Y A…
A: Equation for the best-fit line of the calibration curve is: y=26820x-1323.8
Q: Carboxylic acids, including fatty acids and benzoic acids, are often present in both municipal and…
A:
Q: Indicate with (+) or (-) if the test compound is soluble or insoluble in the solvent. Is Acetanilide…
A: Solubility of organic compound depend on the nature of functional group present
Q: Upon this addition of potassium chromate, you observe no formation of precipitate. Which of the…
A: Pb2+, Ag+, and Hg22+ give a white precipitate with HCl. So the formation of white precipitate with…
Q: A 10.0mL, sample of whisky was diluted to 5.00.0 mL, A 4:00ML aliquot of the dilute Sample was…
A: Given: Volume of Fe+2 = 19.6 mL Concentration of Fe+2 = 0.1250 M Volume of Cr2O7-2 = 50.0 mL…
Q: Explain the meaning of the advantages of coulometry * No need to prepare, standardize, or store…
A: The coulometry method is for determining the quantity of a substance during an electrolysis reaction…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- A 25.00mL wastewater sample was analyzed for its Mg2+ content using a standard gravimetric method. the sample was diluted to 3.00L and an 11.00mL aliquot was treated to precipitate magnesium as MgNH4PO4.6H2O using (NH4)2HPO4 as the precipitating agent. the precipitate was then filtered, washed, dried, and ignited resulting in a 0.1325mg Mg2P2O7 residue. How much Mg (in ppm) is present in the original sampleA sample containing iron is approximately 99.0% w/w Fe. Using ammonia, iron is precipitated as Fe (OH)3 which is ignited to Fe203. (a) What is the gravimetric factor for analyte Fe (AW=55.85 g/mol) and precipitate Fe203 (FW=159.69 g/mol)? (b) What mass of sample is needed to ensure that the Fe203 precipitate would weigh at least 1.00 g?Approximately 6 mL of conc. perchloric acid ( 72% ) was transferred to a bottle and diluted with about 1 liter of water. A sample containing 251.5 mg of primary standard Na2B4O7.10H2O (Fwt= 382g/mol) required 27.41 mL of the HClO4 solution to reach the methyl red end point. What is the molar concentration of the HClO4 solution? Na2B4O7.10H2O + HClO4 ------------> NaClO4 H2B4O7.10H2O
- Approximately 6.0mL of concentrated perchloric acid (70%) was transferred to a bottle and diluted with about 1.0L of water. A sample containing 251.5 mg of primary standard Na2B4O7.10H2O required 27.41 mL of the HClO4 solution to reach the methyl red end point. Calculate the molar concentration of the HClO4 (Fwt = 382g/mole)a 10g soil sample was gently stirred with 250 ml of 1.0 M CH3COO(NH4) solution for 24 h and centrifuged to separate the solution. The solution recovered after centrifugation was titrated with distilled water to a volume of 1 liter and analyzed for cations. Analytical results showed that the solution contained 20 mg/L Ca, 2 mg/L Mg, 1 mg/L K, and 0.5 mg/L Na. Calculate the number of cation exchange equivalents and express it in meq/100 g of soilSO4 -two content in 7689mL of a water sample was precipitated as Na2SO4. The precipitated was filtered, washed and calcined in an empty crucible with a mass of 27.0234g. The mass of the crucible plus Na2SO4 (142g/mol) was 27.7708g. Calculate the %m/v of Na (23g/mol) and the concentration of Na in the sample in ppm.
- Aspirin powder = 0.8110g MW of Aspirin = 180g.mol-1 Volume of 0.5N HCl consumed in back titration = 23.50mL Volume of 0.5N HCl consumed in blank titration = 44.50mL Percent purity (USP/NF) = Aspirin tablets contain NLT 90.0% and NMT 110.0% of the labeled amount of aspirin (C9H8O4) What is the calculated weight (in grams) of pure aspirin?..Precipitimetry The chloride in a 4.321-g food sample was precipitated through the addition of 50.00 mL of a standard AgNO3 solution (10.00 mL AgNO3 = 11.22 mL KSCN). The precipitate was coated with nitrobenzene and the mixture was diluted to 250.0 mL. A 50.00 mL aliquot was taken from the diluted solution and required 4.56 mL back titration with a %3D standard KSCN solution (22.33 mL KSCN = 0.9758 g AgNO3). %3D Formula Masses: AgNO3 = 169.87; CI = 35.45 Calculate the following: 1. Molar concentration of KSCN solution M %3D 2. Molar concentration of AgNO3 solution M %3D 3. % (w/w) chloride in the original sample =Salt (NaCl) in food is determined by a potentiometric titration with silver nitrate as titrant and precipitation of Chloride. The salt content of a cracker is determined by extracting 10.0g of cracker with 100.0ml of water, filtered, and a 25ml aliquot titrated with 0.02M AgNO3. It takes 17.25ml to reach the end point. Calculate the weight % salt in the cracker.
- A mixture containing only KCl and NaBr is analyzed by the Mohr Method. A 0.3172-g sample is dissolved in 50 mL water and titrated to the Ag2CrO4 endpoint, requiring 36.85 mL of 0.1120 M AgNO3. A blank titration requires 0.71 mL of titrant to reach the same endpoint. Report the % (w/w) KCl and NaBr in the sample. [Answer should be 82.41 % (w /w)]2+ as (6) A sample of an ore was analyzed for Cu* follows. A 1.25 g sample of the ore was dissolved in acid and diluted to volume in a 250 mL volumetric flask. A 20 mL portion of the resulting solution was transferred by pipet to a 50 ml volumetric flask and diluted to volume. An analysis showed that the concentration of 2+ Cu* in the final solution was 4.62 ppm. What is the weight percent of Cu in the original ore?In the laboratory, a student was tasked to prepare a stock solution of HCl for titration. The available analytical grade HCl solution in the stock room was labelled 35% w/v HCl. The student proceeded to prepare the stock solution by mixing 10mL of the HCl solution with 490mL of analytical grade water. Then, the solution was further diluted by adding 5mL, since the total volume of the solution did not reach the 500mL etched mark on the volumetric flask. To prepare the titrant, the student mixed 10mL of the stock solution, then added 40mL of analytical grade water. The titrant was subsequently used to determine the concentration of two titrand. *Use the table as a reference 1. What is the normality of the available HCl reagent in the stock room?* 5.08 N 10.15 N 20.3 N 11.0 N None of the choices 2. What is the normality of the stock solution of HCl?* 0.09N 0.10N 0.11N 0.12N None of the choices 3. What is the normality of the titrant?*…