Question

complete the table by filling the colour of the indicator in the given solutions
substance bluelitmus redlitmus, phenolphthalein, methyl orange of hydrolic acid ,sodium hydroxide,sodium chloride ​

Answer 1

Explanation:

(a) Methyl orange: Methyl orange changes its colour to yellow when added to a base or an alkali.

(b) Litmus paper: Red litmus paper turns blue, whereas blue litmus paper remains blue in a base or an alkali.

(c)Phenolphthalein is pink in an alkaline solution but turns colourless in an acidic solution.

hope this helps you.....

Answer 2

Answer: Sodium hydroxide- Turns red litmus blue, Methyl orange changes its colour to yellow and turns phenolphthalein pink

Sodium chloride- No change in any one

Explanation: The reasons are:-

• Since sodium chloride is a salt and an ionic substance, it cannot change the colour of the litmus paper because it is neither a base nor an acid.
• Sodium chloride also does not have any change on Phenolphtalein or methyl orange indicators.
• As a salt and an ionic substance, sodium chloride is neither a base nor an acid and cannot alter the colour of the litmus paper. A base is sodium hydroxide. Blue paper won't alter when exposed to a sodium hydroxide solution that is dilute. Because it is a base, it will turn red litmus blue.
• When a solution is acidic, phenolphthalein is colourless; nevertheless, when the solution is basic, it turns pink.
• A base is sodium hydroxide. When blue dye is exposed to a weak sodium hydroxide solution,

Hence, Sodium hydroxide- Turns red litmus blue, Methyl orange changes its colour to yellow and turns phenolphthalein pink

Sodium chloride- No change in any one