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mafiozo [28]
3 years ago
14

What is the pH of a solution that has a concentration of 1 X 10-3 hydrogen ions?

Chemistry
1 answer:
kykrilka [37]3 years ago
8 0

Given :

Concentration of hydrogen ions, H^+ = 10^{-3} \ ions.

To Find :

The pH of a solution.

Solution :

We know, pH of a solution is given by :

pH = - log [ H^+]\\\\pH = -log ( 10^{-3})\\\\pH = 3

Therefore, the pH of the solution is 3 .

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Atoms of arsenic (As) are often added to silicon (Si) in a process called doping to change the conductivity of the silicon. How
Basile [38]

Answer:

B.) An atom of arsenic has one more valence electron and more electron shells than an atom of silicon, so the conductivity decreases because the arsenic atom loses the electron.

Explanation:

Silicon is located in the 3rd row and 14th column in the periodic table. Arsenic is located in the 4th row and 15th column in the periodic table. This means that arsenic has one more valence electron than silicon. Since arsenic is located one row down from silicon, its valence electrons occupy higher energy orbitals.

Silicon maintains a crystal-like lattice structure. Each silicon atom is covalently connected to assume this shape. When silicon gains one extra electron from arsenic, it experiences n-type doping. This new electron is not tightly bound in the lattice structure. This allows it to move more freely and conduct more electricity. This can also be explained using band gaps. Silicon, which previously had an empty conduction band, now has one electron in this band. This lowers the band gap between the conduction and valence bands and increases conductivity.

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157.9144 hours / 24 hours = 6.5498 days.

4 0
3 years ago
In a 0.737 m solution, a weak acid is 12.5% dissociated. calculate ka of the acid.
r-ruslan [8.4K]
Hello! Let me try to answer this :)

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Answer:

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Explanation:

4 0
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