Try free sample papers for Olympiads
Register individually for Unified Council Olympiads
Grade 7 | Science | Acid-base synthetic indicators, Acids, bases and salts, Olympiad, CBSE, ICSE, Maths Olympiad, Science Olympiad, English Olympiad
Acid-base synthetic indicatorsMethyl orange ad Phenolphthalein is commonly used synthetic acid-base indicators.
Methyl orange yields yellow color in the basic medium while Pink color in acidic medium.
Phenolphthalein yields pink colour in the basic medium while remains colorless in acidic medium.
Ph scale
It represents the strength if an acid and base. It has the value ranging from 1 to 14. The neutral solution has the pH value of 7, an acidic solution has pH value less than 7 and a basic solution has pH value ranging between 7 to 14.
Universal indicatorIt is a mixture of indicators that give a different color for most of the pH values. Usually, a pH paper is used for testing the pH value.
Lower the pH value higher is the acidic nature of the substances which means it is a strong acid. The higher the pH value means above 7 means the stronger the base is.
Get me the extra edge for Olympiads Exams
