Question

What is diamminetriaquahydroxochromium(II) nitrate?

A.

[Cr(NH3)2NO3]OH(aq)

B.

[Cr(NH3)2(H2O)3](OH)NO3

C.

[Cr(NH3)2(H2O)3(OH)]NO3

D.

[Cr(NH3)2(OH)]NO3 • 3H2O

E.

[Cr(NH3)2(H2O)3(OH)](NO3)2

Answer 1

diamminetriaquahydroxochromium(II) is complex entity

So,

Cr with 2 NH3, 3 H2O and 1 OH should be in complex compound

Nitrate is anion balancing the charge.

Since Cr is in +2 state.

OH- is balancing one charge

Other charge will be balanced by NO3-

So, there will be only 1 NO3

C is correct Answer

Answer: C

A is wrong because OH is outside complex entity []

B is wrong because OH is outside complex entity []

D is wrong because H2O is outside complex entity []

E is wrong because, there are 2 NO3