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Oxana [17]
2 years ago
7

A liquid is boiled in a beaker until all of the liquid has evaporated. a powdery substance remains in the beaker. which does thi

s indicate about the original liquid
ASAP PLEASE IM LITERALLY IN THE EXAM RN
Chemistry
2 answers:
bearhunter [10]2 years ago
6 0
Answer: original liquid
Maslowich2 years ago
4 0
The original liquid, was not a pure substance
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Give the coordination number of the central metal ion in the following complex ions.
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Answer:

a). Coordination no. of [Ni(en)_2(NH_3)_2]^2+ = 6

b). Coordination no. of [Fe(en)(ox)Cl_2]^2- = 6

Explanation:

Coordination number is defined as number of donar atoms bonded to the central atom of the complex ion.

a). Coordination no. of [Ni(en)_2(NH_3)_2]^2+ = 6

en or ethylenediamine is a bidentate ligand.

In bidentate ligand, two atoms directly bonded to the central atom.

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So, coordination no.= No. of bidentate ligand x 2 + No. of unidentate ligand

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b). Coordination no. of [Fe(en)(ox)Cl_2]^2- = 6

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oxalate ion (ox) is also a bidentate ligand.

Cl is a unidentate ligand

So, coordination no.= No. of bidentate ligand x 2 + No. of unidentate ligand

                                = 2\times 2 + 2 = 6

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