Phenolphthalein is a mild acid used in both medicine as an ingredient in laxatives and in science as a substance for testing the...
Why does a titrated sample that is fuschia with phenolphthalein turn colorless when the solution is blown into? Why did the solution turn to pink at the end of the titration ? What would happen if a student only added 1 drop of phenolphthalein indicator to a 3 mL NH_3/H_2O solution wh...
What is an indicator of chemistry? How is this for a definition? What are chemical indicators? How are they used in titrations? (a) What is an indicator? (b) What is an auto indicator? What is the function of the indicator phenolphthalein? Write the definition of an indicator. What ...
aPHENOLPHTHALEIN: [translate] a你知道吗?废旧电池中含有大量的重金属污染物——铬、铅、汞等。由废旧电池所产生的污染,危害作用是缓慢的也是深远的。当它们和普通的家庭垃圾混合后,在一定的条件下,会慢慢发生一系列化学反应,释放出有毒物质,这些有毒物质焚烧时会污染大气,渗入地下时污染地下水或江河湖泊;一旦进入...
aPhenolphthalein indicator 酚酞显示[translate] aGood night and sweet dreams dear 晚上好和美梦亲爱[translate] aAlthough again sweet candy,also has a bitter day.即使再甜的糖,也有苦的一天。 虽然再甜糖果,也有一苦涩天即使再甜的糖,也有苦的一天。[translate] ...
What is a neutral solution - A solution which is neither acidic nor basic is called a neutral solution. Its pH value is 7. It does not change the colour of the indicator.A solution is defined as neutral if the concentration of hydrogen ions is the same a
abelow is some questions for the order 下面是有些问题为命令[translate] aSynthesis and curing behavior of a benzoxazine based on phenolphthalein and its high performance polymer. 综合和根据酚酞和它的高性能聚合物的benzoxazine的治疗行为。[translate] ...
The pH range for phenolphthalein is A3.2-4.5 B4.5-6.5 C5.5-7.4 D8.3-10.5Submit Which salt is colourless? AKMnO4 BBaSO4 CNa2CrO4 DCoCI2Submit Which salt is colourless? AKMnO4 BBaSO4 CNa2CrO4 DCoCl2Submit Two solutions A and B have pH values of 3.0 and 9.5 respectively. Which of ...
aTitrate the excess alkali with 0.5 N HCl, using 3 drops of phenolphthalein indicator. The initial color of the native and modified gum is slightly yellow. The initial color of native starch is cloudy white and modified starch is clear. . Use a calibrated pH meter (see SOP for pH calibrat...
designed to identify thepHof a solution over a wide range of values. There are several different formulas for universal indicators, but most are based on a patented formula developed by Yamada in 1933. A common mixture includes thymol blue, methyl red, bromothymol blue, and phenolphthalein....