During performing an experiment on neutralisation reaction, Ravi took
about 100 mL of sodium hydroxide solution and pour approximately the same
amount of concentrated hydrochloric acid to it.
He observed a very vigorous reaction with evolution of large amount of heat.
When he dipped litmus paper into the solution it turned red. He was surprised
with the result though he had read all the instructions and precautions given to
him by his teacher.
(a) What was the expected result of the experiment?
(b) What went wrong in the experiment performed by Ravi?
(c) Why Ravi observed a very vigorous reaction with evolution of large amount
of heat when he added concentrated hydrochloric acid to sodium hydroxide?
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ᴡʜʏ ʀᴀᴠɪ ᴏʙsᴇʀᴠᴇᴅ ᴀ ᴠᴇʀʏ ᴠɪɢᴏʀᴏᴜs ʀᴇᴀᴄᴛɪᴏɴ ᴡɪᴛʜ ᴇᴠᴏʟᴜᴛɪᴏɴ ᴏғ ʟᴀʀɢᴇ ᴀᴍᴏᴜɴᴛ ᴏғ ʜᴇᴀᴛ ᴡʜᴇɴ ʜᴇ ᴀᴅᴅᴇᴅ ᴄᴏɴᴄᴇɴᴛʀᴀᴛᴇᴅ ʜʏᴅʀᴏᴄʜʟᴏʀɪᴄ ᴀᴄɪᴅ ᴛᴏ sᴏᴅɪᴜᴍ ʜʏᴅʀᴏxɪᴅᴇ? ... ɪɴ ᴀᴅᴅɪᴛɪᴏɴ ᴛᴏ ᴛʜɪs, ʀᴀᴠɪ ᴜsᴇᴅ ᴄᴏɴᴄᴇɴᴛʀᴀᴛᴇᴅ ғᴏʀᴍ ᴏғ ᴛʜɪs ᴀᴄɪᴅ ᴡʜɪᴄʜ ᴄᴀɴ ᴇᴠᴇɴ ᴄᴀᴜsᴇ ʙᴜʀɴs.
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