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Which colour precipitate is obtained by ...

Which colour precipitate is obtained by reaction of phosphate radical with ammonium molybdate

A

Green

B

Pink

C

Canary yellow

D

Violet

Text Solution

AI Generated Solution

The correct Answer is:
To determine the color of the precipitate formed by the reaction of phosphate radical with ammonium molybdate, we can follow these steps: ### Step 1: Identify the Reactants The reactants involved in this reaction are: - Phosphate radical (PO4^3-) - Ammonium molybdate ((NH4)2MoO4) ### Step 2: Understand the Reaction Conditions The reaction typically occurs in the presence of concentrated nitric acid (HNO3). This acid helps to facilitate the reaction and stabilize the phosphate. ### Step 3: Write the Reaction Equation The balanced chemical reaction can be represented as follows: \[ \text{H}_3\text{PO}_4 + 12 \text{(NH}_4)_2\text{MoO}_4 + 21 \text{HNO}_3 \rightarrow \text{NH}_4\text{3PO}_4 \cdot 12 \text{MoO}_3 + 21 \text{NH}_4\text{NO}_3 + 12 \text{H}_2\text{O} \] ### Step 4: Identify the Precipitate The product formed from the reaction is ammonium phosphomolybdate, which is represented as: \[ \text{NH}_4\text{3PO}_4 \cdot 12 \text{MoO}_3 \] ### Step 5: Determine the Color of the Precipitate The precipitate formed, ammonium phosphomolybdate, is known to produce a canary yellow color. ### Conclusion Thus, the color of the precipitate obtained from the reaction of phosphate radical with ammonium molybdate is canary yellow. ### Final Answer The correct answer is option C: Canary Yellow precipitate. ---
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