National Coaches
as goldenrods are found beneath concrete and national coaches crush them as the go past, this takes them out of their ore and forms an indicator.
They are metres beneath concrete and only coaches or heavy objects may crush them
An acid base indicator is a chemical substance that has the ability to change color depending on the pH.
Recreation of an indicator using an acid and a base involves mixing a colorless or faintly colored acid-base indicator with an acid to make the solution acidic (and change color) and then adding a base to neutralize the acid and return the indicator to its original color. This process demonstrates the reversible nature of acid-base indicators and how they can be used to visually indicate the presence of acids or bases in a solution.
This indicator changes his color.
common household indicators of acid base
it has (red acid) and a (blue base)
abbas
Phenolphthalein is used as an indicator during the titration of tartaric acid because the pH at which phenolphthalein changes color (around pH 8.2-10) is close to the equivalence point of the titration of tartaric acid with a strong base like NaOH. This makes it a suitable indicator for detecting the endpoint of the titration when the acid has been completely neutralized by the base.
The most appropriate indicator for a strong acid/strong base titration is phenolphthalein.
It is a substance(chemical or natural) which changes colour in the presence of an acid or base.
it is an indicator.
indicator
For the titration of a strong acid, the indicator typically used is phenolphthalein. Phenolphthalein changes color in the pH range of 8.2 to 10, which is suitable for titrating a strong acid with a strong base to determine the equivalence point.