Discuss the construction and use of Frost Ebsworth diagrams in the determination of stability of oxidation states.

Explain the term electrolysis. Discuss briefly the electrolysis of (i) moltenNaCl (ii) aqueous sodium chloride solution (iii) molten lead bromide (iv)water.

Calculate the initial thiocyanate ion concentration, [SCN-]o, in the reaction mixture obtained by combining 2.00 mL of 0.00194 M Fe3+ (aq) with 1250µL of 0.00182 M SCN- (aq). Give your answer in millimolar (mM) to three decimal places. You may assume that volumes of dilute, aqueous solutions are additive.

The following oxidation-reduction reactions take place in basic medium. For each reaction, (i) Assign oxidation state for each atom in the equation; (ii) Indicate oxidation half-equation and reduction half-equation; (iii) Balance the equation by half-equation method; (iv) Indicate which reactant is oxidizing agent and which reducing agent. (v) State and verify whether the pH of the medium decreases, increases, or remains constant as the reaction proceeds.

17) The number of Faraday of charge needed to deposit 3.54 x 10-4 moles of Cr+3 ion from its solution is

The chief chemist of the Brite-Metal Electroplating Co. isrequired to certify that the rinse solutions that are discharged from the company’s tin-plating process into the municipal sewer system contain no more than 10 ppm (parts per million) by mass of Sn2+. The chemist devises the following analytical procedure to determine the concentration. At regular intervals, a 100-mL (100-g) sample is withdrawn from the waste stream and acidified to pH = 1.0. A starch solution and 10 mL of 0.10 M potassium iodide are added, and a 25.0-mA current is passed through the solution between platinum electrodes. Iodine appears as a product of electrolysis at the anode when the oxidation of Sn2+ to Sn4+ is practically complete and signals its presence with the deep blue color of a complex formed with starch. What is the maximum duration of electrolysis to the appearance of the blue color that ensures that the concentration of Sn2+does not exceed 10 ppm?

Salbutamol, which is used in ventolin inhaler to relieve asthma, has the structural formula as shown below. Write all the chemical equations involved when salbutamol is: (b) (i) HO OH N. H. OH (I) refluxed with pyridinium chlorochromate.

(a) Determine the mass of Na,S2O3.5H20 required to prepare 0.1N solution in 50 ml volume. (b) Compare combustion of Anthracene and Xylene in sufficient supply of air. Which one will produce more carbon rich sooty flame and why? (c) Consider electrode potential data given in Question 4 (c). Predict which two electrodes combination will give maximum potential. Provide justification. (d) Explain two industrial applications of acidic buffer solutions. (e) Discuss the importance of Hess law with suitable example.

Give detailed Solution with explanation needed

Magnesium, the element, is produced commercially by electrolysis from a molten salt (the “electrolyte”) using a cell similar to the one shown here. (a) What is the most common oxidation number for Mg when it is part of a salt?