How do u determine the concentration of hydrochloric acid by thermochemistry?
aqueous sodium hydroxide concentration : 120 mol/dm3
and--
reading 1-- 10 cm3 of HCL,,while 40 cm3 of NaOH
reading 2-- 15 cm3 of HCL,,while 40 cm3 of NaOH
reading 3-- 20 cm3 of HCL,,while 40 cm3 of NaOH
,
,
,
reading 7-- 40 cm3 of HCL,,while 40 cm3 of NaOH
and the temperatures of the above readings--
reading 1-- initial- 30 degree celsius,
final- 34 degree celsius
reading 2--initial-29 degree celsius
final-34 degree celsius,,
reading 3--initial- 30 degrees
final-36 degrees
reading 4--initial- 30
final-36
reading 5--initial-30
final-36.5
reading 6 --initial-30.5
final-37.5
reading 7--initial-30
final-37 degree celsius,,
by the above given information,,can u find the concentration of HCL acid ??
(i think the process is called thermochemistry or something like that,,)
Answer:
You're meant to use the heat of reaction to determine how much HCl reacted with the amount of sodium hydroxide that you added. In each case you have to consider the volume of solution and you have to assume that the heat capacity of the solution is constant and that it is the same as water unless you have calibrated your calorimeter.
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