1. Why is phenolphthalein an appropriate indicator for titration of a strong acid with a strong base? Explain based on the pH at the equivalent point and the transition range for phenolphthalein. 2. A In an acid/base titration, why must the indicator (phenolphthalein) be a s...
The structural changes causing the color changes can be illustrated with the example of phenolphthalein, which is widely used in analytical practice (reaction [XI]). [XI] . Loss of the first proton does not cause any great structural change in the molecule. With the removal of the second, ...
5′,5′′-Diisopropyl-2′,2′′-dimethylphenolphthalein Thymolphthalein solid 分子结构式: 订货信息: 货号品名规格包装单价 百里香酚酞IND25g58元 百里香酚酞AR25g68元 性状:白色或微黄色结晶性粉末。溶于醇和酮,溶于硫酸显示红色,溶于碱显示蓝色,不溶于水。
1. Why is phenolphthalein an appropriate indicator for titration of a strong acid with a strong base? Explain based on the pH at the equivalent point and the transition range for phenolphthalein. 2. A The indicator metacresol purple changes ...
A pH test strip is a tool used to monitor the acidity or alkalinity of a substance, such as dialysate in healthcare settings. It works by comparing the color change of the test trip to a color chart to determine the pH value within an acceptable range. ...
The effects of phthalazinone and cardo moieties on the solubility and thermal resistance of copolyarylates are discussed in detail. With only phthalazinone moieties, the polyarylate has high thermal resistance with the glass transition temperature (T_g) of 335 掳C, but poor solubi...
别名:麝香草酚酞,百里酚酞 5′,5′′-Diisopropyl-2′,2′′-dimethylphenolphthalein Thymolphthalein solid 分子结构式: 订货信息: 货号品名规格包装单价货期库存 1227142724百里香酚酞IND25g68元现货1 1227142723百里香酚酞AR25g68元促销1 提示信息:偏远地区如新疆西藏宁夏甘肃等地可能无法运送液体,下单前请联系客服...
Two series of cardo polyimides were prepared from 1,4-bis(4-fluorophthalimide)cyclohexane with different trans/cis ratios and phenolphthalein/ o -cresolphthalein by aromatic nucleophilic substitution reaction. The inherent viscosities of synthesized polymers were found in the range of 0.55-0.66 dL/g...
Litmus changes color between a pH of 5.5 and 8. What is this range called? An acid turns the indicator litmus to what color? What is the color of a phenolphthalein indicator in an acidic solution? 1. A substance with a pH of 9 is considered {Blank}. \\ 2. If re...
In an effort to contribute to the restocking of natural populations and facilitate the transition of fishermen into small-scale farmers, juvenile C. caementarius have been cultured in Chile using a traditional clear-water (CW) culture system (Morales and Meruane, 2013). However, due to the ...