A more common approach examines a namesake curve after a substance like phenolphthalein has been used.
One method of this uses an alcohol, imidazole, sulfur dioxide and iodine in a reaction that uses a current supplied by platinum electrodes to drive it; that version is named for Karl Fischer and is used to detect water. One way of obtaining the result of this approach often uses a thermistor to measure the "breakpoint" when the rate of the change of temperature hits an inflection point; that method is the thermometric method. A more common approach examines a namesake curve after a substance like phenolphthalein has been used. After the equivalence point is reached, this method's endpoint is where the chosen measure has an inflection point; this measure is commonly electric potential or pH. For 10 points, what is this chemical technique that determines the concentration of an unknown substance in a sample.
One method of this uses an alcohol, imidazole, sulfur dioxide and iodine in a reaction that uses a current supplied by platinum electrodes to drive it; that version is named for Karl Fischer and is used to detect water.
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