SATHEE: The dand fblock elements

The dand fblock elements - Result Question 54

####54. The addition of excess of aqueous $H N O_{3}$ to a solution containing $[C u (N H_{3})_{4}]^{2 +}$ produces

[1999]

(a) $C u^{+}$

(b) $[C u (H_{2} O)_{4}]^{2 +}$

(d) $C u (N O_{3})_{2}$

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Solution:

(b) When excess of aq. $H N O_{3}$ to $[C_{4} (H_{3})_{4}]^{2 +}$ produces $[(4 (H_{2} O)_{4}]^{2 +} .$ .

Following equillibrium exist in the given aqueous solution

$[C u (H_{2} O)_{4}]^{2 +} (a q) + 4 N H_{3} (a q) \to$

$[C u (N H_{3})_{4}]^{2 +} (a q) + 4 H_{2} O (l)$

When $H N O_{3}$ is added to this solution:

(excess) $H N O_{3}$ (aq) $+ N H_{3}$ (aq) $⟶$

$N H_{4}^{+} (a q) + N O_{3}^{-} (a q)$

Thus, amount of $N H_{3} (a q)$ will reduce drastically. With a simple application of Le Chatelier’s principle, the equillibrium will shift towards left in the first reaction. Hence, $[C u (H_{2} O)_{4}]^{2 +}$ will form.

The dand fblock elements - Result Question 54

Solution:

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The dand fblock elements - Result Question 54

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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