The correct order of the mobility of the alka | vedclass

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

Question

(A) In an aqueous solution,alkali metal ions get hydrated. The extent of hydration depends on the size of the cation; smaller cations have higher char

Vedclass · Accepted Answer

$Rb^{+} > K^{+} > Na^{+} > Li^{+}$

Vedclass · Answer

(A) In an aqueous solution,alkali metal ions get hydrated. The extent of hydration depends on the size of the cation; smaller cations have higher charge density and thus higher hydration energy.The order of hydration energy is $Li^{+} > Na^{+} > K^{+} > Rb^{+}$.Due to higher hydration,the effective size of the hydrated $Li^{+}$ ion is the largest,which makes it move the slowest in an electric field.Therefore,the mobility of the ions in an aqueous solution is inversely proportional to their hydrated size,resulting in the order: $Rb^{+} > K^{+} > Na^{+} > Li^{+}$.

The correct order of the mobility of the alkali metal ions in aqueous solution is

Similar Questions

On heating,$LiNO_3$ gives how many compounds among the following?
$Li_2O, N_2, O_2, LiNO_2, NO_2$

Which of the following metals liberate hydrogen gas on reaction with dilute $H_2SO_4$?

Why is $Li_{2}CO_{3}$ decomposed at a lower temperature whereas $Na_{2}CO_{3}$ at higher temperature?

Give two uses of $KOH$.

Assertion : Lithium carbonate is not so stable to heat.
Reason : Lithium being very small in size polarizes large $CO_3^{2-}$ ion leading to the formation of more stable $Li_2O$ and $CO_2$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module