Define the following terms: (a) Standard solution (b) Normal solution (c) Indicator

Standard solution:

A solution whose concentration is known is called a standard solution .

Normal solutions

solution meaning 1 gram equivalent is dissolved in one liter of solution.

Indicators:-

indicators are the chemical substances(weak acids or base) that give us a visible signal (such as color change ) with respect to a threshold concentration of certain species.

They are used to find equivalence point of the titration such as phenolphthalein (C₂₀H₁₄O_{4 )}for acid base titration

A solution of known concentration is called a standard solution.

When we use gram equivalent instead of moles in defining the concentration we get Normal solutions

Indicators are chemical substances which are used to find the equivalence point of a titration