There are many more delicious items and savoury snacks available in-store. Select from Bacon & Cheddar Biscuits, Tortilla Chips & Salsas, Crackers, and so much more! Come visit us today for a shopping experience like no other!
A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually. Hence, a pH indicator is a chemical detector for hydronium ions (H3O+) or hydrogen ions (H+) in the Arrhenius model. Normally, the indicator causes the color of the solution to change depending on the pH. Indicators can also show change in other physical properties; for example, olfactory indicators show change in their odor. The pH value of a neutral solution is 7.0.
Definition of 'indicator'. indicator (ÉªndÉªkeÉªtÉÊ³ ) An indicator is a measurement or value which gives you an idea of what something is like. ...vital economic indicators, such as inflation, growth and the trade gap. The number of wells is a fair indicator of the demand for water. Synonyms: sign, mark, measure, guide More Synonyms of indicator. 2. countable noun. A car's indicators are the flashing lights that tell you when it is going to turn left or right.