Cr_2O_7^{2-} underset{Y}{overset{X}{longleftr | vedclass

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

Question

(A) The interconversion between dichromate $(Cr_2O_7^{2-})$ and chromate $(CrO_4^{2-})$ ions is pH dependent.In an alkaline medium $(OH^{-})$,the dich

Vedclass · Accepted Answer

$X = OH^{-}, Y = H^{+}$

Vedclass · Answer

(A) The interconversion between dichromate $(Cr_2O_7^{2-})$ and chromate $(CrO_4^{2-})$ ions is pH dependent.In an alkaline medium $(OH^{-})$,the dichromate ion is converted into the chromate ion: $Cr_2O_7^{2-} + 2OH^{-} \rightarrow 2CrO_4^{2-} + H_2O$.In an acidic medium $(H^{+})$,the chromate ion is converted into the dichromate ion: $2CrO_4^{2-} + 2H^{+} \rightarrow Cr_2O_7^{2-} + H_2O$.Therefore,for the reaction $Cr_2O_7^{2-} \xrightarrow{X} 2CrO_4^{2-}$,$X$ must be $OH^{-}$.For the reverse reaction $2CrO_4^{2-} \xrightarrow{Y} Cr_2O_7^{2-}$,$Y$ must be $H^{+}$.Thus,$X = OH^{-}$ and $Y = H^{+}$.

$Cr_2O_7^{2-} \underset{Y}{\overset{X}{\longleftrightarrow}} 2CrO_4^{2-}$,$X$ and $Y$ are respectively

Similar Questions

$A$ blue borax bead is obtained with:

When a small amount of vanadium is added to steel,it becomes:

Fusion of $MnO_2$ with $KOH$ in the presence of air or an oxidizing agent like $KNO_3$ forms a colored compound. Identify the product and its color.

Which compound of zinc is white in the cold state and turns yellow in the hot state?

Vedclass Test Series

Exam Paper Generator

Online Exam Module