Question

a student added acedic acid to a test tube containing sodium carbonate .then he brought burning match stick near to it .what will happen. give reaction. ​

Answer 1

The procedure you have described is often used to test for the presence of hydrogen gas. It is informally named ‘the squeaky pop test’. You bring a lit splint to the mouth of a test tube containing suspect gas (the gas which you are testing). The positive result is that you hear the squeaky pop, and thus you have evidence that the suspect gas does indeed contain H2. (A small amount of) water is produced by the combustion reaction which takes place, but you are unlikely to be able to observe this. The equation of the reaction is:

2H2+O2→2H2O

(hydrogen + oxygen → water)