What information can be learned about the element chlorine (Cl) by looking at the periodic table? Select all that apply.

Chemistry

2 answers:

olasank [31]3 years ago

5 0

That it is number 17 35.45 it's period is 3.

Hope that helped ^^

pantera1 [17]3 years ago

3 0

It's a halogen. It's a non metal. It's valency is 1. It is highly electronegative and non metallic in nature.

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Rudiy27

The equation for the first dissociation is:
H₂S(aq) + H₂O(l) ⇄ HS⁻(aq) + H₃O⁺(aq)
The acid dissociation constant, Ka1 is 9.0 x 10⁻⁸
Construct ICE table and obtain their equilibrium concentrations:
H₂S(aq) + H₂O(l) ⇄ HS⁻(aq) + H₃O⁺(aq)
I (M): 0.1 0 0
C (M): -x +x +x
E (M): 0.1 -x x x
So:
9.0 x 10⁻⁸ = $\frac{X^{2} }{0.1-x}$
x = 9.4 x 10⁻⁵
From the equilibrium table:
[H₃O⁺] = x = 9.4 X 10⁻⁵ M
[HS⁻] = x = 9.4 X 10⁻⁵ M
The equation for the second dissociation of the acid is:
HS⁻(aq) + H₂O(l) ⇄ S⁻²(aq) + H₃O⁺(aq)
The acid dissociation constant Ka2 is 1.0 x 10⁻¹⁷
Construct ICE table and obtain their equilibrium concentrations:
HS⁻(aq) + H₂O(l) ⇄ S²⁻(aq) + H₃O⁺(aq)
I (M): 9.4 x 10⁻⁵ 0 9.4 x 10⁻⁵
C (M): -x +x +x
E (M): 9.4 x 10⁻⁵ -x x 9.4 x 10⁻⁵ + x
So:
1.0 x 10⁻¹⁷ = $\frac{(x)(9.4 x 10^{-5} + x) }{(9.4 x 10^{-5} - x) }$
x = 1.0 x 10⁻¹⁷ M
Therefore the equilibrium concentrations are as follows:
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