লক্ষ্য করুন: এই এন্ট্রির অনুবাদ বর্তমানে মান পর্যালোচনার অধীনে রয়েছে, তাই কিছু বিষয়বস্তু সাময়িকভাবে শুধুমাত্র ইংরেজিতে প্রদর্শিত হচ্ছে।
এই এন্ট্রিটি এখনও আপনার ভাষায় অনুবাদ করা হয়নি, তাই নিচে মূল লেখাটি দেখানো হচ্ছে।
phenolphthalein
This term is primarily used in technical, scientific, and medical registers. In a laboratory setting, it is almost exclusively associated with acid-base titrations, where its sharp color transition from colorless to pink serves as a visual signal for the equivalence point.
As a chemical substance, it is treated as an uncountable mass noun. It refers to the compound itself rather than individual units, meaning it does not have a standard plural form in professional chemical discourse.
Meanings
Examples
Add a few drops of phenolphthalein to the flask before starting the titration.
The solution turned a vibrant pink as soon as the phenolphthalein reacted with the base.
Wait for the phenolphthalein to change color to signal the endpoint of the reaction.
Why is the phenolphthalein still colorless in this beaker?
I wonder if phenolphthalein is the best indicator for this specific acid-base pair.
Phenolphthalein was once a common ingredient in over-the-counter laxatives.
The FDA banned the use of phenolphthalein in laxatives due to safety concerns.
Old medical texts mention phenolphthalein as an effective purgative for severe constipation.