6 l Nitric acid is made from ammonia. One of the stages in nitric acid production involves the oxidation of ammonia to p

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6 L Nitric Acid Is Made From Ammonia One Of The Stages In Nitric Acid Production Involves The Oxidation Of Ammonia To P 1 (33.37 KiB) Viewed 88 times

6 l Nitric acid is made from ammonia. One of the stages in nitric acid production involves the oxidation of ammonia to produce nitrogen taxide, NO. In this process a mixture of ammonia and oxygen is passed over a platinum-rhodium catalyst. One manufacturer uses a pressure of Sam and a temperature of 850°C. The equation for this reaction is different from that in a ANH/W) + 50,19) NO[g) 6HCl -90486 mol Use this equation, and the enthalpy changes of formation of nitrogenit) oxide and water to calculate the enthalpy change of formation of ammonia in mol! You may find it helpful to draw a Hess cycle first. You must show your working A NOI = 904 mot WHO)-2413mor 13 5:0 7 This question is about the titration of a weak acid with a strong base. a) A standard solution of ethanedioic acid, which is a weak diprotic acid. can be used to determine the concentration of a sodium hydroxide solution. 25.0 cm of the ethanediolc acid solution, with concentration 3,80g dm was pipetted into a conical flask. A few drops of Indicator solution were added. The ethanedioic acid was titrated with the sodium hydroxide solution which was in the burette The titration was repeated and the following results were obtained Molar mass of ethanediolc add 900g mol" Titration 4 27.70 Titration 1 18.00 0.00 18.00 Final reading / cm Initial reading/cm Titre.com Titre used to find the mean titre Titration 2 17.60 0.00 1760 Titration 3 3530 17.60 17.70 10.05 17.65 Mean titre / cm ) in the appropriate row, tick () those titre values that should be used to find the mean, and use these titres to calculate it Write the value of the mean titre in the box provided in the table of results 2 Ethanedioic acid is a weak acid. Name a suitable indicator for this titration and state the colour change at the end point