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6 Nitric acid is made from amon. One of the stages intric acid production involves the ridation of ammonia to produce nitrogenul de NOIn this process a mixture of mon and oxygen is passed over a platinum-thodium Catalyst. One manufacturer sa pressure of Sam and a temperature of 80 C The equation for this actions diferent from that in H4NHlại + 50g) + 4NO gi + VH Ong -90 Use this equation, and the enthalpy changes of formation of nitrogen oude and water to calculate the enthalpy change of fomation of ammonia in mol You may find it helpful to draw a Hens cycle finit. You must show your working HINDI-90. Amol Mi-241 umol 5:0 7 This question is about the ratio of a week acid with a roba ol A standard solution of ethanediolacidwhich is weak.dipotic and can be used to determine the concentration of sodium hydroxide solution 250cm of The standok acid solution with conception 3.0 dm was pipetted into a conical flask. A few drops of indicator solution were added. The ethanedioic acid was titrated with the sodiumhydde solution which was in the borette The ration was repeated and the following results were obtained Molar mass of ethanediolacid 900gmol Titration 4 Titration 2 17.00 27.70 Titation 10.00 0.00 18.00 0.00 Final reading.com In reading Titre em Titre used to find the mean trein 3530 17.00 1770 10:05 17.60 1765 Menecm In the appropriate row.ck in those titre values that should be used to find theme and use these tries to calculate it Write the value of the meantire in the box provided in the table of sults thanediskaod is a weak acid. Ne suitable indicator for this ration and state the colour change at the end point. 121 Name of indicator Colour change the end point from