to indicate what the chemical is.
iodine...
You can buy methyl orange indicator from chemical supply companies, online chemical retailers, or laboratory equipment suppliers. It is available in liquid form or as indicator paper/strips for convenient use. Make sure to follow safety guidelines when handling this chemical.
Starch is not the indicator. Iodine is the indicator of starch.
Chemical indicator dye is a substance that changes color in the presence of a specific chemical or changes in pH. It is commonly used in laboratories to visually indicate the presence or absence of certain substances in a solution.
Litmus
He can use a chemical reaction when it is mixed with CO2
indicator
Yes, the indicator react with the solution.
An indicator is a chemical compound that changes colour and structure when exposed to certain conditions and is therefore useful for chemical tests. Litmus, for example, is an indicator that becomes red in the presence of acids and blue in the presence of bases.
Iodine is commonly used as a chemical indicator for the presence of starch. When iodine comes into contact with starch, a blue-black color change occurs, making it easy to visually detect the presence of starch in a solution.
A colour change in a chemical indicator implies that a distinguishable chemical property has been changed in the given system.
A change in mass can be an indicator of a chemical reaction if there is a conversion of reactants into products with different mass compositions. For example, if gas is released during a reaction or if there is a change in the number of moles of substances present, there may be a noticeable change in mass.