phenolphthalein turns pink when basic solution is added to it but remains colorless in case of neutral and acidic solution
The easiest way is to add back some of the solution you were titrating. If phenolphthalein remains, it will react with the solution and change back to purple. Incidentally, phenolphthalein will always remain in the solution of the titration reaction - it changes color depending upon the pH of the solution, but the indicator itself is not affected by the titration reaction.
A simple solubility test can be used to identify an unknown substance. Most substance will make a precipitate when around certain molecules.
It will change its colour from white to red on increasing the pH(for bases)
Litmus paper test: Dip a strip of litmus paper into the sample solution. If the paper turns red, it indicates the presence of acid. Phenolphthalein test: Add a few drops of phenolphthalein indicator to the solution. If the solution turns pink or red, it indicates the production of acid.
by using phenolphthalein,litmus paper (red and blue),cabbage,tea,and PH paper or PH meter
phenolphthalein reaction is indicative of blood, it is only a presumptive test and false positives are possible. Additionally, the reaction is not species specific. Positive reactions are not limited to human blood.
To identify an unknown substance, one can conduct tests such as spectroscopy, chromatography, and chemical reactions to determine its properties and composition. These tests can help determine the substance's characteristics and compare them to known substances for identification.
The KCl flame test is significant in identifying unknown substances because it helps determine the presence of specific metal ions based on the color of the flame produced when the substance is burned. This test is commonly used in chemistry to distinguish between different elements and compounds, providing valuable information about the composition of the unknown substance.
To test an unknown substance at home, you can use simple methods like observing its physical properties (such as color, texture, and smell), conducting a solubility test, performing a flame test, using pH strips for acidity/basicity, and conducting a simple chemical reaction test. Remember to handle unknown substances with caution and always wear appropriate safety gear.
The easiest way is to add back some of the solution you were titrating. If phenolphthalein remains, it will react with the solution and change back to purple. Incidentally, phenolphthalein will always remain in the solution of the titration reaction - it changes color depending upon the pH of the solution, but the indicator itself is not affected by the titration reaction.
A simple solubility test can be used to identify an unknown substance. Most substance will make a precipitate when around certain molecules.
what would happen if scientists were testing to see if a substance was safe to drink and used phenolphthalein as an indicator and what would happen if the test was done using methyl orange
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The color of the flame is indicative of the constituent elements.
Tartaric acid is a weak acid and does not ionize completely in water to release hydrogen ions. As a result, it does not provide enough free hydrogen ions to turn phenolphthalein indicator pink, which typically requires a pH above 8.2. Tartaric acid's ionization behavior limits its ability to produce the color change associated with the phenolphthalein test.
You can test if a substance is acidic or alkaline using pH testing strips or solutions. Acids have pH values below 7, while alkaline substances have pH values above 7. Alternatively, you can also use indicators like litmus paper or phenolphthalein to determine the pH of a substance.
It will change its colour from white to red on increasing the pH(for bases)