Excess of KI reacts with CuSO_4 solution and | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The reaction between $KI$ and $CuSO_4$ is: $2CuSO_4 + 4KI 	o Cu_2I_2 + I_2 + 2K_2SO_4$. In this reaction,$Cu^{2+}$ is reduced to $Cu^+$ (forming

Vedclass · Accepted Answer

$CuI_2$ is formed

Vedclass · Answer

(B) The reaction between $KI$ and $CuSO_4$ is: $2CuSO_4 + 4KI 	o Cu_2I_2 + I_2 + 2K_2SO_4$. In this reaction,$Cu^{2+}$ is reduced to $Cu^+$ (forming $Cu_2I_2$) and $I^-$ is oxidized to $I_2$. Then,$I_2$ reacts with $Na_2S_2O_3$: $I_2 + 2Na_2S_2O_3 	o Na_2S_4O_6 + 2NaI$. Here,$Na_2S_2O_3$ is oxidized to $Na_2S_4O_6$ and $I_2$ is reduced to $I^-$. $CuI_2$ is not formed because $Cu^{2+}$ oxidizes $I^-$ to $I_2$ immediately,resulting in the formation of $Cu_2I_2$ (cuprous iodide).

Excess of $KI$ reacts with $CuSO_4$ solution and then $Na_2S_2O_3$ solution is added to it. Which of the statements is incorrect for this reaction?

Similar Questions

What are interstitial compounds? Give their examples and characteristics.

Misch metal is an alloy of:

Describe the preparation of potassium dichromate from iron chromite ore. What is the effect of increasing $pH$ on a solution of potassium dichromate?

Fill in the blanks:
$1.$ The copper layer on copper coins in the $UK$ is .......... .
$2.$ Copper-silver coins in the $UK$ are an alloy of ............ .
$3.$ The catalyst used for the oxidation of $SO_2$ to $SO_3$ is ......... .

The chief constituents of steel made in India are

Vedclass Test Series

Exam Paper Generator

Online Exam Module