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Covalent Bond vs Ionic Bond

An aqueous so...

Question

An aqueous solution of $K I$ dissolves $I_{2}$ to form $K I_{3}$ . Which of the following statement(s) is/are true?

The solution contains

K^{2 +}

and

I^{-}

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The solution contains

K^{+}

and

I_{3}^{-}

ions

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The solution is violet in colour

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K I_{3}, I_{2}

, behaves as Lewis base and

I^{+}

as Lewis acid

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Solution

The correct options are
B The solution is violet in colour
D The solution contains $K^{+}$ and $I_{3}^{-}$ ions
Potassium is an alkali metal belonging to group 1A. It has one electron in its valence shell. Hence it can form mono-positive cation only. Hence option A is incorrect. The violet color solution contains potassium ions and uni negative triiodide ions. The triiodide anion is formed when the uni-negative iodide ion (a lewis base) donates its pair of electrons to the iodine molecule.

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Similar questions

Q. In the reaction ,

K I_{(a q)} + I_{2} \to K I_{3}

(water soluble)

I- ion react with iodine in aqueous solution to form I3- ion .When 1L of solution containing 1mole of KI and 0.25 mol of I2 was reacted with excess of AgNO3 ,0.80 mol of yellow precipitate was formed.The stability constant of. I3- ion is

I_{3}^{-}

is formed when

I_{2}

combines with

I^{-}

.
"

I_{2}

behaves as a Lewis base."
Answer whether the above statement is true or false. If true enter 1, else 0.

Q. A saturated solution of

I_{2}

in water contains

0.33 g l i t r e^{- 1}

I_{2}

more than this can be dissolved in a

K I

solution because of the following equilibrium:

I_{2} + I^{-} ⇌ I_{3}^{-}

. A

0.1 M K I

solution

(0.1 M I^{-})

actually dissolves

12.5 g / l i t r e I_{2}

, most of which is converted to Assuming that the concentration of

I_{2}

in all saturated solution is the same, calculate the equilibrium constant

(K_{c})

for the above reaction. What is the effect of adding water to clear saturated solution of

I_{2}

K I

solution.

Q. Which is Lewis base :

I_{2} + I^{-} \to I_{3}^{-}

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An aqueous solution of KI dissolves I2 to form KI3. Which of the following statement(s) is/are true?

An aqueous solution of $K I$ dissolves $I_{2}$ to form $K I_{3}$ . Which of the following statement(s) is/are true?