Round 7: Tossup 2

By observing a change in this property, Nessler’s reagent can detect minute amounts of ammonia. (15[1])This property is compared using Nessler cylinders during a namesake “analysis” that can also use simpler analogues of spectrophotometers to measure this non-absorbance (15[1])property using Beer’s law. Ninhydrin (-5[1])undergoes a change in this (-5[1])property to detect (*) fingerprints. A change in this property for compounds such as phenol•phthalein (“fih-nawl-THAY-leen”) or bromo•thymol (10[1])denotes (0[1])the endpoint of an acid-base titration. Indicators (10[1])undergo changes in this property depending on pH. For 10 points, name this property that can be imparted by pigments. ■END■

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