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- Like heavy water (D₂O), so-called “semi-heavy water”(HDO) undergoes H/D exchange. The scenes below depict aninitial mixture of HDO and H₂ reaching equlibrium.(a) Write the balanced equation for the reaction. (b) Is the valueof Kgreater or less than 1? (c) If each molecule depicted repre-sents 0.10 M, calculate K.What are theconsequences of shifting thechemical equilibrium of theformation of bicarbonate fromcarbon dioxide and watertowards the consumption ofproducts of the reversereaction?(d) Compare the greenliness between the. following two schemes : Ca(NO3)2 acetic acid RScheme-I OH ÑO2 NO2 NaNO3 H2SO4 Scheme-II NO2
- (a) How many grams of H2O2 are contained in a solution that requires for titration 14.05 mL of KMNO4 of which 1.000 mL 0.008378 g Fe (i.e. will oxidize that amount of iron from the divalent to the trivalent state)? (b) How many grams and how many milliliters of oxygen measured dry and under standard conditions are evolved during the titration?(a) Interpret the variation, including the overall trend across the 3d series, of the following values of hydration enthalpies (in kJ mol·'). [Ca(H2O)«]²*: -2468; [Ti(H2O)«J*: -2700; [V(H2O)«]**: -2814; [Mn(H2O)6]**: -2743; [Fe(H2O)«]²+: -2843; [Co(H20)6]**: -2904; [Ni(H2O)c]*: -2986. (b) By making use of LFSE (Ligand field stabilization energy) in tetrahedral and octahedral geometries, predict whether hausmannite mineral (Mn3O4) has a normal spinel or inverse spinel structure. Describe the structure of the mineral in detail.Give appropriate reason for each of the following :(i) Metal fluorides are more ionic than metal chlorides.(ii) Perchloric acid is stronger than sulphuric acid.(iii) Addition of chlorine to KI solution gives it a brown colour but excessof Cl2 makes it colourless.
- (A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true but the second is false, and (D) if the first sentence is false but the second is true. 1. In oxygen fixation, the alkaline-iodide-azide solution was used to acidify the solution. The brown hydrated precipitate that formed in the process of oxygen fixation was magnesium hydroxide. 2.Visual inspection is enough to determine if water is of appropriate quality. The standards for drinking water quality are typically set by governments or by international standards. 3.Deeper levels of water often do not reach 100% air saturation equilibrium because they are not shallow enough to be affected by the waves and photosynthesis at the surface. The dissolved oxygen content is an important index when considering its suitability for town supply. 4. The normality (N) of a solution is determined by multiplying the molarity of the solution by its volume. In the standardization of the sodium thiosulfate…(iv) Explain the following observationsPropose a single synthesis method for cobalt(II) sulphate (CoSO4.7H2O) and describe in detail.
- A sulfuric acid plant produces a considerable amount ofheat. This heat is used to generate electricity, which helpsreduce operating costs. The synthesis of H2SO4 consists ofthree main chemical processes: (a) oxidation of S to SO2,(b) oxidation of SO2 to SO3, (c) the dissolving of SO3 inH2SO4 and the subsequent reaction with water to formH2SO4. If the third process produces 130 kJ/mol, howmuch heat is produced in preparing a mole of H2SO4 froma mole of S? How much heat is produced in preparing5000 pounds of H2SO4?Nitrous acid (HNO2) disproportionates in acidic solutionto nitrate ion (NO3- ) and nitrogen oxide (NO). Write abalanced equation for this reaction.The active ingredient in Antabuse, a drug used for the treatment of chronicalcoholism, is tetraethylthiuram disulfide The sulfur in a 0.4169-g sample of an Antabuse preparation was oxidized to SO2,which was absorbed in H2O2 to give H2SO4. The acid was titrated with 19.25 mLof 0.04216 N base. Calculate the percentage of active ingredient in thepreparation.