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- Write a balanced chemical equation for the reaction that occurswhen (a) titanium metal reacts with O2(g); (b) silver(I)oxide decomposes into silver metal and oxygen gas whenheated; (c) propanol, C3H7OH(l) burns in air; (d) methyltert-butyl ether, C5H12O(l), burns in air.Chemists working with fluorine and its compounds some- times find it helpful to think in terms of acid-base reac- tions in which the fluoride ion (F¯) is donated and ассеpted. (a) Would the acid in this system be the fluoride donor or fluoride acceptor? (b) Identify the acid and base in each of these reactions: CIF;O2 + BF; CIF,O, · BF, -- TiF, + 2 KF – K2[TiF,]Write the expression Kc for the following reactions. (a) Fe2+(aq) + Ce4+(aq) ⇋ Fe3+(aq) + Ce3+(aq) (b) CaCO3(s) ⇋ CaO(s) + CO3(g)
- Describe how the following changes are brought about: (i) Pig iron into steel. (ii) Zinc oxide into metallic zinc. (iii) Impure titanium into pure titanium.(a) Write the chemical equation for the complete combustion of butane. (b) Why is it not advisable to use a butane stove inside a tent?Boric acid, B(OH)3, is an acid that acts differently from the usual Brønsted-Lowry acids. It reacts with water according to B(OH);(aq) + 2 H,0(€)2B(OH), (aq) + H;O* (aq) K, = 5.8 × 10¬10 (a) Draw Lewis structures for B(OH); and B(OH)4. Can these be described as Lewis acids or Lewis bases? (b) Calculate the pH of a 0.20 M solution of B(OH)3(aq).
- 4. True or False (1) Chlorine demand is the difference between total chlorine and free chlorine (2) In raw wastewater samples, most of nitrogen is in the form of nitrate. (3) If 10 mg/L of NH3-N is converted to nitrate, the nitrate concentration is 10 mg/L as N. (4) Free chlorine consists of hypochlorous acid and hypochlorite. (5) Chloramines is a weaker disinfectant than free chlorine. (6) Na2HPO4 contributes to the orthophosphates. (7) For phosphorus analysis, the purpose of the autoclave is to kill the phosphorus bacteria which interferes colorimetric analysis. (8) Chloride is an effective disinfectant for water and wastewater treatment. (9) "Crown" corrosion is caused by the corrosive action of H₂SO4. (10) Breakpoint chlorination can be used for removal of ammonia.Answer must be explainedBalance the following equations and indicate whetherthey are combination, decomposition, or combustionreactions:
- Please provide neat solutionThe psychoactive drug methamphetamine ("speed"), which is sold as the prescription medication Desoxyn, C10H15N, under- goes a series of reactions in the body; the net result of these reac- tions is the oxidation of solid methamphetamine by oxygen gas to produce carbon dioxide gas, liquid water, and an aqueous solution of urea, CH4N₂O. Write the balanced equation for this net reaction.What volume (in mL) of 3.20 M HNO3(aq) needs to be added to excess Na,CO3(s) to generate 4.85 L CO2(g) at standard temperature and pressure (STP)? Provide your answer in decimal notation rounded to the appropriate number of significant figures.
