Propose how the components of a mixture containing Toluene (b.pt= 110.50C) and CCl4 (b.pt. =770C) can be separated. Include how can you justify the effective separation of the components.
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Propose how the components of a mixture containing Toluene (b.pt= 110.50C) and CCl4 (b.pt. =770C) can be separated. Include how can you justify the effective separation of the components.
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- Oral rehydration salts are stated to contain the following components: Sodium Chloride 3.5g Potassium Chloride 1.5g Sodium Citrate 2.9g Anhydrous Glucose 20.0g 8.342 g of oral rehydration salts are dissolved in 500 ml of water. 5 ml of the solution is diluted to 100 ml and then 5 ml is taken from the diluted sample and is diluted to 100 ml. The sodium content of the sample is then determined by flame photometry. The sodium salts used to prepare the mixture were: Trisodium citrate hydrate (C6H5Na3O7, 2H2O) MW 294.1 and sodium chloride (NaCl) NW 58.5. Atomic weight of Na = 23. The content of Na in the diluted sample was determined to be 0.3210 mg/100 ml. Determine the % of stated content of Na in the sample. The stated should be 104.5, how??Oral rehydration salts are stated to contain the following components: Sodium Chloride 3.5g Potassium Chloride 1.5g Sodium Citrate 2.9g Anhydrous Glucose 20.0g 8.342 g of oral rehydration salts are dissolved in 500 ml of water. 5 ml of the solution is diluted to 100 ml and then 5 ml is taken from the diluted sample and is diluted to 100 ml. The sodium content of the sample is then determined by flame photometry. The sodium salts used to prepare the mixture were: Trisodium citrate hydrate (C6H5Na3O7, 2H2O) MW 294.1 and sodium chloride (NaCl) NW 58.5. Atomic weight of Na = 23. The content of Na in the diluted sample was determined to be 0.3210 mg/100 ml. Determine the % of stated content of Na in the sample.3. From the given data below answer the following questions: i. mass of anthranilic acid (AA) = 0.048 g. ii. mass of tetraphenylcyclopentadienone (TPC) = 0.108 g. iii. m.p. of the final product (1,2,3,4-tetraphenylnaphthalene) (TPN) is 192.0- 196 °C (1*) & 200.5-203.5 °C (2"d). iv. Mass of the final product (TPN) = 0.079g. A. Calculate the theoretical yield of TPN (assume Isopentyl Nitrite is in excess) (limiting reactant?). Show Work!!! B. Calculate the %yield of TPN. Show Work!!! C. Comment on the %yield, purity and errors from these results.
- 3. From the given data below answer the following questions: i. mass of anthranilic acid (AA) = 0.048 g. ii. mass of tetraphenylcyclopentadienone (TPC) = 0.108 g. iii. m.p. of the final product (1,2,3,4-tetraphenylnaphthalene) (TPN) is 192.0- 196 °C (1*) & 200.5-203.5 °C (2"d). iv. Mass of the final product (TPN) = 0.079g. A. Calculate the theoretical yield of TPN (assume Isopentyl Nitrite is in excess) (limiting reactant?). Show Work!!! B. Calculate the %yield of TPN. Show Work!!!Determine the gravimetric analysis of the products of complete combustion of acetylene ?2 ?2 with 200 percent stoichiometric air.A student performs a crystallization on an impure sample of biphenyl. The sample weighs 0.5 g and contains about 5% impurity. Based on his knowledge of solubility, the student decides to use benzene as the solvent. After crystallization, the crystals are dried and the nal weight is found to be 0.02 g. Assume that all steps in the crystallization are performed correctly, there are no spills, and the student lost very little solid on any glassware or in any of the transfers. Why is the recovery so low?
- When a Vitamin C (ascorbic acid; MM = 176.12 g mol-1) tablet is crushed, dissolved and titrated with 0.0340 M KIO3(aq) to a purple/blue endpoint (given by a starch indicator), the volume of KIO3 used is 29.80 mL. If 60 mg of ascorbic acid is the recommended dietary allowance (i.e., 100% of the RDA), then what is the % RDA for the Vitamin C in the tablet? KIO3(aq) + 5 KI + 6 H+ → 3 I2(aq) + 3 H2O I2 (aq) + ascorbic acid → 2 I- + dehydroascorbic acid5 g of cobalt carbonate and 13 mL of concentrated hydrochloric acid were used. In another glass, prepare a solution with 8.4 mL of anhydrous ethylenediamine and 2.8 mL of concentrated hydrochloric acid. They are mixed and added and 6.5 mL of peroxide were added to it.30% hydrogen, thenconcentrated hydrochloric acid is added, followed by60 mL of ethanol. 5.1234 g were obtained orange solid [Co (en) 3] Cl3 What is the percentage yield of the reaction. The reactions are shown in the images.Certain amount of pure charcoal (carbon) has to be burnt with supplied natural air. Process engineer allowed exact amount of air required to burn the entire charcoal completely to carbon dioxide. Carbon has no reaction with nitrogen gas present in the air. In the reaction outlet if 50 kg of carbon dioxide gas was found, calculate the amount of charcoal and air used. (12C, 16O, 14N).
- 1)Please express the normal salt (NaCl) concentration in body fluid into molarity (mM).2) Commercial fuming Sulphuric acid (Oleum-H2S2O6) is 99.9%. solution. Please convert it into molarity.3) Find out the Volume (dm3) of product (gas) at RTP when 0.58 M, 150 mL NaOH (aq.) reacts with 350 mL, 0.25 NH4Cl.4) The above reaction has the product Ammonia, which when dissolved in 650 mL ethanol makes an alkaline ethanolic solution. Find its molarity (M) 5) Calculate the adult dose as per the BW of the baby. (Child dose-50 mg and the BW of the baby is 48 lb (British pound) (1lb=0.453 Kg)An analysis for borohydride ion is based on its reaction with Ag+: BH4- + 8Ag+ + 8OH- → H2BO3- + 8Ag(s) + 5H2O The purity of a quantity of KBH4 to be used in an organic synthesis was established by diluting 3.258g of the material to exactly 500.0mL, treating a 100.0 mL aliquot with 50.00 mL of 0.2639M AgNO3 and titrating the excess silver ion with 3.36 mL of 0.0397 M KSCN. Calculate the percent purity of the KBH4 [Report the numerical value of the result to two decimal places - NO UNITS](a) A sample of aspirin (acetyl salicyclic acid) of molecular mass 180, on analysis was found to contain60% carbon, 4.4% hydrogen and 35.6% oxygeni.Determine the empirical formula of aspirinii. What is the molecular formula of aspirin?iii. State the technique that can be used to determine the molecular weight of aspirinb) i. Given the structure of all the isomers of a compound with molecular formula C3H6Cl2ii. Which structure(s) in b(i) is(are) optically active?