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How could you determine whether phenolphthalein remains in the residue of a titration reaction?
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.
Why are solubility tests helpful to determine unknown substances?
A simple solubility test can be used to identify an unknown substance. Most substance will make a precipitate when around certain molecules.
What will happen when phenolphthalein paper is used to test a base?
It will change its colour from white to red on increasing the pH(for bases)
Two tests for reactions that produce acid end products?
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.
How can you test for acids and bases?
by using phenolphthalein,litmus paper (red and blue),cabbage,tea,and PH paper or PH meter
What are the limitations of phenolphthalein test?
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.
How can one test an unknown substance to identify it?
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.
What is the significance of the KCl flame test in identifying unknown substances?
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.
How can I test an unknown substance at home to identify it?
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.
How could you determine whether phenolphthalein remains in the residue of a titration reaction?
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.
Why are solubility tests helpful to determine unknown substances?
A simple solubility test can be used to identify an unknown substance. Most substance will make a precipitate when around certain molecules.
Is solution x safe to drink with phenolphthalein?
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
What will happen with each what indicators used to test an acid phenolphthalein?
Does mindless behavior like the omg girls
How does a flame test help to identify inorganic substances?
The color of the flame is indicative of the constituent elements.
Why tartaric acid not give phenolphthalein test?
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.
How can you test whether it is acid or alkali?
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.
What will happen when phenolphthalein paper is used to test a base?
It will change its colour from white to red on increasing the pH(for bases)
