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- A researcher reconstituted a vial of 750 mg Cefuroxime Sodium Powder for Injection with 6mL of sterile water for injection. The reconstituted solution was dark amber-colored solution. The package insert states that solution colors range from clear to yellow depending on concentration, diluent, and storage conditions. The researcher was then hesitant to give the patient the solution due to its unusual dark color. Five portions were taken from a batch of cefuroxime sodium. Prior to testing in the instrument, each part was subjected to one of the following conditions: Conditions Specifications Temperature Portion 1: 8°C ± 2°C Portion 2: 30°C ± 2°C Portion 3: 40°C ± 2°C Light Portion 4: Kept in the dark Portion 5: Exposed to direct sunlight 1. Of the several solutions prepared, which absorbance value results should be compared with each other to answer the questions of the pharmacist? Explain your answer.Which element is oxidized in the following reaction? Fe²+ + H+ + Cr₂O7 ²2¯→→Fe³++Cr³++ H₂O (A) Cr (B) H 0(C) 0 (D) Fe (E) MgYou were assigned to assay a product sample of milk of magnesia. A 0.600-g sample was reacted with 25.00 mL 0.10590 N H2SO4 . The excess unreacted acid in the solution required 13.00 mL of 0.09500 N NaOH when titrated to reach the methyl red end point. Determine the dosage strength of the product in terms of % Mg(OH)2 content. Type your answer in 2 decimal places, numbers only.
- Please balance: KMnO4 + KNO2+HCl->MnCl 2 + KCl + KNO3 + H2ONote that the following questions, 29-32, all refer to the same reaction: Potassium permanganate reacts with oxalic acid (H2C204) in aqueous sulfuric acid according to the following reaction: 2 KMNO4(aq) + 5 H2C204(aq) + 3 H2SO4(aq) 2 MNSO4 H20(s) + K2SO4(aq) + 10 CO2(g) + 6 H20(g) What volume of 0.250 M KMno4 solution is needed to react completely with 5.229 g of oxalic acid? (assume sulfuric acid is in excess) Answer in mL with the correct number of significant figures; do not use scientific notation. Potassium permanganate reacts with oxalic acid (H2C204) in aqueous sulfuric acid according to the following reaction: 2 KMNO4(aq) + 5 H2C204(aq) + 3 H2SO4(aq) 2 MnSO4 H2O(s) + K2SO4(aq) + 10 CO28) + 6 H2O() The reaction is run a second time and 8.22 g of MNSO4H20 are obtained. What volume of carbon dioxide gas is collected at 1.01 bar and 23 C? Answer in L with the correct number of significant figures; do not use scientific notation.Fluorite, a mineral of calcium, is a compound off the metal with fluorine. Analysis shows that a 43.35-g sample of fluorite contains 21.11 g of fluorine. Calculate the following: (a) Mass of calcium in the sample. g Ca (b) Mass fractions of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass fraction Ca mass fraction F (c) Mass percents of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass % Ca mass % F
- 4) Ethanol (C2H6O) content in a wine sample can be determined using Cr2O72- solution by redox titration in acidic medium. The unbalanced titration reaction is given below: Cr2Or2-(aq) + C2H6O (aq) Cr (aq) + C2H«Oz (aq) (unbalanced, acidic medium) To titrate 5 mL of wine sample, 38.0 mL of 0.3 M Cr2O" solution is required. What is the molar concentration (mol/L) of ethanol in the wine sample?b) Ammonium iron sulphate, (NH4)2 Fe (SO4}2 . 6H20], RMM = 392 may be used to standardize a solution of %3D potassiumpermangangte (VII) in the presence of sulphuric acid. The ionic equation is given below MnO4 + Fe* + H* → Mn* + Fe* + H2O i) Balance the equation above. MOTTA ii) What mass of ammonium (II) sulphate is required to prepare 250cm of 0.1M solution? 3. 3 3. iii) 25cm' of the iron (II) salt solution required 26.5cm' of potassium permanganate solution for complete reaction. Calculate the molarity of the potassium permanganate solution.9.) Which set of coefficients balances the following equation? Cu(NO3)2 (aq) + (NH4)2S (aq) --> CuS (s) + NH4NO3 (aq) A) 1, 1, 1, 1 B) 1, 1, 1, 2 C) 2, 2, 2, 4 D) none of the above
- 0.1745 g of primary standard Na2C2O4 is used to set a freshly prepared KMnO4 solution and 30.24 mL of KMnO4 solution is spent at the turning point. Since 36.92 mL of this KMnO4 solution is consumed for the determination of iron in 0.5618 g ore sample, calculate the amount of iron in the ore in terms of % iron (III) oxide and % iron (III) chloride. (Fe: 56, K: 39, Mn: 55, O: 16, Na:23, C: 12, Cl: 35.5 g/mol) (Please type answer)In the 2018 Olympics, a total of 340 gold medals were given to players. An Olympic gold medal have at least 6 g of Au (gold) and 92.5% silver. Assume each medal is prepared by layer a 60-mm diameter and 3-mm thick, gold-free silver alloy disk with gold thru electrolytic deposition by means of a gold (III) solution, identify time required (hrs) to polish all the gold medals with the given gold content and has a steady current of 50A. (Molar mass = 196.97 g/mol)11. Identify the oxidizing agent in the chemical reaction 5Fe* (ag) + MnO4 (ag) +- 5Fe*3 + Mn*(ag) + 8H*(aq) 4H:O) The answer is