Question

Orange solution of potassium dichromate turns yellow on adding sodium hydroxide to it why??

Answer 1

Answer:

Explanation:

When sodium hydroxide is added to the potassium chromate solution, the orange colour turns back to yellow. The sodium hydroxide reacts with hydrogen ions, removing them from the solution

Answer 2

Orange solution of potassium dichromate turns yellow on adding sodium hydroxide to it, because of the formation of the Potassium chromate.

Explanation:

• The Dipotassium salt of dichromic acid is called Potassium dichromate (K2Cr2O7) which is orange in colour.
• It is used in the organic chemistry as an oxidizing agents especially primary alcohols.
• This chemical compound is present naturally in sand, clay, etc.,
• Sodium hydroxide is an inorganic compound which is also called as Caustic soda.
• It is alkaline in nature.
• When Potassium dichromate is treated with NaOH, it forms chromate ions.
• This chromate ions are reason for the yellow colour solution.

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