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dalvyx [7]
3 years ago
15

What is the pH of a solution whose hydronium ion [H20+] (or proton [H+1)

Chemistry
1 answer:
pav-90 [236]3 years ago
8 0

Answer:

pH =  -  log(7.6 \times  {10}^{ - 5} )  \\ pH = 4.12

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Which pair has identical electron configurations?
Thepotemich [5.8K]

Identical electron configurations : K⁺ and Cl⁻

<h3>Further explanation  </h3>

In an atom, there are levels of energy in the shell and sub-shell  

This energy level is expressed in the form of electron configurations.  

Charging electrons in the sub-shell uses the following sequence:  

<em>1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.  </em>

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S²⁻ : [Ne] 3s²3p⁶

Cl : [Ne] 3s²3p⁵

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K⁺ : 1s² 2s² 2p⁶ 3s² 3p⁶

Cl⁻ : 1s² 2s² 2p⁶ 3s²3p⁶

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S :[Ne] 3s²3p⁴

Ar : [Ne] 3s²3p⁶

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Cl⁻ : 1s² 2s² 2p⁶ 3s²3p⁶

K : 1s² 2s² 2p⁶ 3s² 3p⁶4s¹

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<em><u>To determine the number of significant figures in a number use the following 3 rules:Non-zero digits are always significant.</u></em>

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