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Comparing the strength of acid using electrical conductivity

Answer Text:
Comparing the strength of acid using electrical conductivity:
Procedure:
- #50cm^3# of 2M-hydrochloric acid solution is placed into a beaker and set up apparatus as shown below.
- The switch is closed and the brightness of the bulb noted.
Observations
-Strong acids like HCl, #HNO_3# and sulphuric acid gave a brighter bulb light than weak acids like
ethanoic, carbonic acids e.t.c
Explanations
- Strong acids are completely dissociated and have more #H^(+)# in solution and hence have got a higher electrical conductivity; than solutions of weak acids which are only partially ionized thus have fewer hydrogen ions in solution