The colour of CrO_4^{2-}(aq.) is not changed | vedclass

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

Question

(B) The equilibrium between chromate and dichromate ions is given by: $2CrO_4^{2-}(aq.) + 2H^+(aq.) \rightleftharpoons Cr_2O_7^{2-}(aq.) + H_2O(l)$.In

Vedclass · Accepted Answer

$NH_3$ solution

Vedclass · Answer

(B) The equilibrium between chromate and dichromate ions is given by: $2CrO_4^{2-}(aq.) + 2H^+(aq.) \rightleftharpoons Cr_2O_7^{2-}(aq.) + H_2O(l)$.In acidic medium $(pH $HCl$,$CH_3COOH$,and $NO_2$ (which forms $HNO_3/HNO_2$ in water) provide an acidic medium.$NH_3$ solution is basic $(pH > 7)$,so it does not shift the equilibrium towards the formation of $Cr_2O_7^{2-}$,thus the yellow colour remains unchanged.

The colour of $CrO_4^{2-}(aq.)$ is not changed by:

Similar Questions

$H_{2(g)} + I_{2(g)} \rightleftharpoons 2HI_{(g)}$. In this reaction,when pressure increases,the reaction direction:

Le Chatelier's principle is applicable to which of the following?

For the reaction: $A + B + Q \rightleftharpoons C + D$,if the temperature is increased,then the concentration of the products will

The yellow solution of $Na_2CrO_4$ changes to orange red on passing $CO_2$ gas due to the formation of:

Which one of the following conditions will favour maximum formation of the product in the reaction
$A_{2(g)} + B_{2(g)} \rightleftharpoons X_{2(g)}; \Delta_{r} H = -X \ kJ$

Vedclass Test Series

Exam Paper Generator

Online Exam Module