phenolphthalein: A dye used as anacid-base indicator. It is colourlessbelow pH 8 and red above pH 9.6. Itis used in titrations involving weakacids and strong bases. It is also usedas a laxative. brand name Evac-Q-Tabs (Savage); Ex-Lax (Novartis); Modane (Savage); Prulet (Mission ...
Phenolphthalein, normally colourless, attains a deep red hue above pH 10.0. phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator. As an indicator of a solution’s pH, phenolphthalein is colourless below pH 8.5 and ...
phenolphthalein: A dye used as anacid-base indicator. It is colourlessbelow pH 8 and red above pH 9.6. Itis used in titrations involving weakacids and strong bases. It is also usedas a laxative. brand name Evac-Q-Tabs (Savage); Ex-Lax (Novartis); Modane (Savage); Prulet (Mission ...
(Chemistry) a colourless crystalline compound used in medicine as a laxative and in chemistry as an indicator. Formula: C20H14O4 Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014...
phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as anacid-base indicator. As an indicator of a solution's pH, phenolphthalein is colourless below pH 8.5 and attains a pink to deep red hue above pH 9.0. ...
This indicator changes colour at a pH of approximately 8.8.[In-]Calculate the ratio n at pH 8.8.rati ([ln-])/(Hln1)=(f) Methyl orange is another acid-base indicator. Its structure in aqueous solution at pH 4.4 is shown.methyl orange H3C N一-N =N —-SO。 Na+H3C(i) On the ...
eg. titrating NaOH with HCl. Since both are strong acid/base, then the pH of neutralisation is 7. This means the indicator I use should exhibit a colour change when the pH of my solution is in the vincity of 7. Logged "Say you're in a [chemical] plant and there's a snake on ...
标签归档:phenolphthalein 1.0w/v% Phenolphthalein Ethanol (90) Solution|1.0w/v% Phenolphthalein Ethanol (90) Solution|指示剂 发表于2024年3月30日由 1.0w/v% Phenolphthalein Ethanol (90) Solution 货号:169-15735 包装:500mL 和光指示剂溶液 1.0w/v% 酚酞乙醇(90)溶液 中和滴定 ...
The molecule found its first use as a pH indicator as it’s colourless in acids but turns bright purple-pink in alkaline solutions. If you’ve ever done an acid base titration experiment or used pH indicators in research then it’s likely that phenolphthalein was involved. It’s also used...
acolour only the following things in the picture 颜色仅以下事在图片[translate] a直到晚上九点钟他还没有回家 He has not gone home until 9 PM[translate] aprepared by the method of claim 1 由方法要求准备1[translate] a没有 我是独子 I have not been an only son[translate] ...