What color would a Bromothymol solution at pH 9 chegg be?
What is the color of Bromothymol blue at low pH range?
Which indicator is blue in a solution that has a pH of 9?
|6.0 Bromocresol purple||5.2-6.8||purple|
|7.0 Bromophenol blue||6.0-7.6||blue|
|9.0 Chlorophenol red||4.8-6.7||red|
|11 Congo red||3.0-5.0||blue|
What is the actual pH that phenolphthalein changes color at?
1. The pH range that causes color changes is very narrow, approximately pKa +-1. In other words the color of phenolphthalein changes perceptibly between about pH 8.3 and 10.5.
What color is phenolphthalein when the pH is less than 7?
The Phenolphthalein pH Range The pH scale runs from 0 to 14, with a pH of 7 being neutral. Below pH 7 is acidic, while above pH 7 can be considered basic. Phenolphthalein, which is naturally colorless, turns pink when it is exposed to alkaline solutions.
Why you have to do a titration at least twice?
Once you know the concentration of the standard and the amount you used, you can calculate the concentration of the unknown specimen. To ensure accurate results, you must repeat the entire process at least three times. There is a possibility of systematic and random errors that could affect your results.
What is titration used for in real life?
Titration can be used to determine blood sugar levels or to analyze blood for any other diagnosis. It is used to determine the results of pregnancy tests and for other types urinalysis testing. Titration can be used to identify the nutritional breakdown of food.
Why do scientists use titrations?
Scientists need to determine the acidic concentration of an acidic solution. Titration is a method that scientists use to determine the concentration of an acidic solution. Scientists use this method to combine an unknown solution with a base solution to neutralize it. The pH level is then measured in the neutral solution.
What can go wrong in a titration?
There are many factors that can lead to errors in titration results, such as misreading volumes, incorrect concentration values, or poor technique. It is important to be careful when the solution of the known concentration has been introduced into a volume of unknown volume using laboratory glassware, such as a pipette or burette.