what other acid indicators are there other than phenolphthalein?
Are there any better indicators than phenolphthalein?
Hi Bo,
we have several indicators, including litmus, universal indicator, bromothymol blue, methyl orange, and screened methyl orange. There are many, and the list can go on forever, but these are most commonly used. The best, in my case, would be universal indicator or litmus.
Hope I helped! Thanks :)
Methyl Orange and litmus paper are mostly used
There are several other acid-base indicators besides phenolphthalein that can be used to determine the pH of a solution. Here are a few examples:
1. Litmus: Litmus paper is a common acid-base indicator that comes in the form of strips or solutions. It turns red under acidic conditions (pH less than 7) and blue under basic conditions (pH greater than 7).
2. Bromothymol Blue: This indicator is yellow under acidic conditions, green at neutral pH, and blue under basic conditions. It is commonly used in biological and environmental research.
3. Methyl Orange: Methyl orange turns red under acidic conditions (pH less than 3.1) and yellow under basic conditions (pH greater than 4.4). It is frequently used in titrations and other analytical procedures.
4. Universal Indicator: This indicator covers a wide pH range and changes color depending on the acidity or alkalinity of a solution, displaying a range of colors from red under highly acidic conditions to purple under highly alkaline conditions.
Now, in regards to whether there are better indicators than phenolphthalein, it depends on the specific context and requirements of the experiment or application. Each indicator has its own range of usefulness depending on the pH range you are working with, the sensitivity required, and the substances being tested. For example, phenolphthalein is particularly useful in the pH range of 8.2-10, while litmus is better suited for a broader pH range of 4-8. It is important to choose an indicator that matches the specific pH range and accuracy needed for your experiment or analysis.