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mojhsa [17]
3 years ago
6

Choose the best answer that completes the sentence. A complex ion contains _________________. Group of answer choices a central

nonmetal ion bound to one or more ligands. a central metal ion bound to one or more ligands. an anion bound to water. water bound to one or more ligands. ammonia bound to water.

Chemistry
2 answers:
goblinko [34]3 years ago
8 0

Answer: A COMPLEX ION contains (a central metal ion bound to one or more ligands).

Explanation: A complex ion is defined as an ion that is formed between a central metal ion and one or more surrounding ligands, molecules or ions that contain at least one lone pair of electrons. The formation of a complex ion from a metal ion and a ligand is based on Lewis acid - base reaction. The positively charged metal ion( example Cu2+) acts as a Lewis acid, and the ligand, with one or more lone pairs of electrons (example NH3), acts as a Lewis base.

An example of a complex ion is copper ammine ion,{[Cu(NH3)6]2+}.

STatiana [176]3 years ago
5 0

Answer:

A complex ion contains a central metal ion bound to one or more ligands

Explanation:

A complex ion is consists of a central atom or ion, that is usually metallic, called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents.

An example of a complex ion is

[Co(NH3)6]3+

Please go through the attached file for a proper representation of the complex ion.

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Answer:

2.28 × 10^-3 mol/L

Explanation:

The equation for the equilibrium is

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                    Ka = 4.9 × 10^-10

               KaKb = Kw

4.9 × 10^-10 Kb = 1.00 × 10^-14

                   Kb = (1.00 × 10^-14)/(4.9 × 10^-10) = 2.05 × 10^-5

Now, we can set up an ICE table

                     CN^- + H2O ⇌ HCN + OH^-

I/(mol/L)      0.255                     0         0

C/(mol/L)       -x                        +x        +x

E/(mol/L)  0.255 - x                   x         x

Ka = x^2/(0.255 - x) = 2.05 × 10^-5

Check for negligibility

0.255/(2.05 × 10^-5) = 12 000 > 400. ∴ x ≪ 0.255

    x^2 = 0.255(2.05 × 10^-5) = 5.20 × 10^-6

        x = sqrt(5.20 × 10^-6)    = 2.28 × 10^-3

[OH^-] = x mol/L                     = 2.28 × 10^-3 mol/L

5 0
3 years ago
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