The deep blue colour produced on adding excess of ammonia to copper sulphate is due to presence of

Question

The deep blue colour produced on adding excess of ammonia to copper sulphate is due to presence of (A) Cu 2+ (B) [ Cu ( NH 3)4( H 2 O )2]2+ (C) [ Cu ( NH 3)6]2+ (D) [ Cu ( NH 3)2( H 2 O )4]2+

Tardigrade Admin · Accepted Answer

[Cu(H2O)6]SO4 + 2H4OH arrow underset text(pale blue)[Cu(H2O)4(OH)2] xrightarrow textexcess NH4OH underset text(deep blue)[Cu(NH3)4(H2O)2]2+

Q. The deep blue colour produced on adding excess of ammonia to copper sulphate is due to presence of

$C u^{2 +}$

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

$[C u (N H_{3})_{6}]^{2 +}$

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

$[C u (H_{2} O)_{6}] S O_{4} + 2 H_{4} O H \to (pale blue) [C u (H_{2} O)_{4} (O H)_{2}]$ $excess N H_{4} O H (deep blue) [C u (N H_{3})_{4} (H_{2} O)_{2}]^{2 +}$

Q. The deep blue colour produced on adding excess of ammonia to copper sulphate is due to presence of

Cu2+

[Cu(NH3​)4​(H2​O)2​]2+

[Cu(NH3​)6​]2+

[Cu(NH3​)2​(H2​O)4​]2+

[Cu(H2​O)6​]SO4​+2H4​OH→(pale blue)[Cu(H2​O)4​(OH)2​]​ excessNH4​OH​(deep blue)[Cu(NH3​)4​(H2​O)2​]2+​

$C u^{2 +}$

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

$[C u (N H_{3})_{6}]^{2 +}$

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

$[C u (H_{2} O)_{6}] S O_{4} + 2 H_{4} O H \to (pale blue) [C u (H_{2} O)_{4} (O H)_{2}]$ $excess N H_{4} O H (deep blue) [C u (N H_{3})_{4} (H_{2} O)_{2}]^{2 +}$