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- (a) Identify the species that was reduced in the titration reaction. Justify your answer in terms of oxidation numbers. (c) Given that the concentration of KMnO4(aq) was 0.0235M, calculate the number of moles of MnO4− ions that completely reacted with the H2C2O4. d) The student proposes to perform another titration using a 0.139g sample of H2C2O4, but this time using 0.00143MKMnO4(aq) in the buret. Would this titrant concentration be a reasonable choice to use if the student followed the same procedure and used the same equipment as before? Justify your responsExplain the term electrolysis. Discuss briefly the electrolysis of (i) moltenNaCl (ii) aqueous sodium chloride solution (iii) molten lead bromide (iv)water.State whether each of the following statements is true orfalse. Justify your answer in each case.(a) NH3 contains no OH- ions, and yet its aqueous solutionsare basic.(b) HF is a strong acid.(c) Although sulfuric acid is a strong electrolyte, an aqueoussolution of H2SO4 contains more HSO4- ions than SO42-ions.
- The arsenic in a 1.22-g sample of a pesticide was converted to As by suitable chemical treatment. It was then titrated using Ag+ to form Ag3AsO4 as a precipitate. (a) What is the oxidation state of As in As ? (b) Name Ag3AsO4 by analogy to the corresponding compound containing phosphorus in place of arsenic. (c) If it took 25.0 mL of 0.102 M Ag+ to reach the equivalence point in this titration, what is the mass percentage of arsenic in the pesticide?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.(b) (i) 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: HO. OH
- Suppose 7.00 g of AgNO; is added to a solution which contains an excess of dissolved KBr. If 7.32g AgBr is obtained, what is the percentage yield? 6.Assuming 100% dissociation, calculate the freezing point (?f) and boiling point (?b) of 3.29 ? AgNO3(aq).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.
- Give detailed Solution with explanation neededBalance the following redox reactions: (a) In acidic solution, xenon trioxide reacts with iodide ion toproduce xenon gas, triiodide ion (I₃⁻), and water. (b) In basic solution, the hydrogen xenate ion (HXeO₄⁻) dispro-portionates to xenon gas, perxenate ion (XeO₆⁴⁻), water, andoxygen gas.(c) In basic solution, bismuthate ion (BiO₃⁻) reacts with man-ganese(II) ion to produce bismuth(III) and permanganate ions. (d) In basic solution, oxygen difluoride reacts to produce fluo-ride ion, oxygen gas, and water. (e) In acidic solution, manganese(IV) oxide reacts with sulfiteion to form manganese(II) ion, water, and dithionate ion(S₂O₆²⁻).(f) In one of the few reactions known for a statine, the oxidationof astinide ion by chlorine gas in acid solution produces astinateion (AtO₃⁻) and chloride ion.Assign the oxidation numbers of the atoms in the following compounds. (a) Al2O3 (b) XeF4 (c) K2Cr2O7