Does the ambient temperature of the laboratory matter?
Actually, ambient temperature doesn’t play a significant role in the ability to detect a thermometric endpoint. Thermometric endpoints are detected by the rate of change of temperature and not by the actual temperature of the solution. When all of the analyte in a sample is reacted with titrant, we can expect a sudden change in the rate of temperature increase or decrease, depending on whether the reaction is exothermic or endothermic. The only effect that ambient temperature changes can be expected to have is in the absolute accuracy of the titration, and this has nothing to do whether the method of endpoint detection is thermometric, potentiometric or whatever. Volumetric expansion and contraction of fluids can be expected with changes in temperature, and this will have an effect on the accuracy of the titration, if calibration of the method has taken place under a different ambient temperature regime.
