SOLVED: While performing an experiment on neutralization reaction, Ravi took about 100 ml of sodium hydroxide solution and poured approximately the same amount of concentrated hydrochloric acid into it. He observed a very vigorous reaction with the evolution of a large amount of heat. When he dipped litmus paper into the solution, it turned red. He was surprised by the result, even though he had read all the instructions and precautions given to him by his teacher.a. What is a neutralization rea