Write the chemical reaction involved in developing a black and white photographic film. An aqueous $N a_{2} S_{2} O_{3}$ solution is acidified to give a milky white turbidity. Identify the product and write the balanced half chemical reaction for it:

Open in App

Solution

Chemical reaction involved in developing of a black and white photographic film is as follows $C_{6} H_{4} (O H)_{2} + 2 A g B r \to C_{6} H_{4} O_{2} + 2 A g + 2 H B r$ hydroquinone
Aqueous solution of $N a_{2} S_{2} O_{3}$ on acidification gives milky white turbidity of colloidal sulphur. $S_{2} O_{3}^{2 -} (a q) + 2 H^{+} (a q) \to S ↓ + S O_{2} ↑ + H_{2} O$
White turbidity

Suggest Corrections

Similar questions

Question 43

On adding a drop of barium chloride solution to an aqueous solution of sodium sulphite, white precipitate is obtained.

(a) Write a balanced chemical equation of the reaction involved.

(b) What other name can be given to this precipitation reaction?

K_{2} C r_{2} O_{7}

Join BYJU'S Learning Program