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...
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...
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] ...
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 ...
Phenolphthaleinis a colourless, weak acid which dissociates in water forming pink anions. Under acidic conditions, the equilibrium is to the left,and the concentration of the anions is too low for the pink colour to be observed. How does EDTA react with calcium?
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...
The scientific study of matter's characteristics and behaviour is known as chemistry.andare different from the normal vocabulary. It is a branch of natural science that examines the building blocks of matter, including the atoms, molecules, and ions that make up compounds and their composition, ...
Indicators are often used in titration reactions to signal that the equivalence point pH is reached. The indicators added are weak acids or bases that exhibit different colors based on the pH. An example of an indicator is Phenolphthalein.
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] a哈哈,I know you would any day ...