21 THER 368 Hear of Post-Laboratory Questions (Use the spaces provided for the answer and additional paper necessary) 1. A student was given only one graduated cylinder 3. The accepted AHeurn of hydrobromic acid (HBr) to use for this experiment. After using it to measure reacting wrhNaoHsolution and of HNO3reacting with 50.0mLof the assigned acid, the student failedtorinse potassium hydroxide (KOH) solution are identical. ordrythe cylinder before measuring out the50,5mLof (1) Write net ionic equations to show what aque- the base. Would the calculated AHeuten be higher, ous HBr and HNO, have in common. lower, or the same as the literature AHheutan? Briefly explain this difference as a result of using only one graduated cylinder for the experiment. (2) State what aqueous NaOH and KOH have in 2. Explain how the following changes in the proce- dure for this experiment would affect the results. (1) A glass beaker was used insteadofapressed polystyrene cup. (3) Explain why you would expect that AHheutzn for HBr reacting with NaOH solution and AHeutzm for HNO3 reacting with KOH solution would be identical. Write ap- propriate equations to support this explanation. (2) A pressed polystyrene top was used to cover the polystyrene cup after the acid and base solutions had been mixed. section