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BARSIC [14]
3 years ago
8

A solution has a hydrogen ion concentration of 0.001 M, what is the pH of the solution

Chemistry
1 answer:
LenKa [72]3 years ago
4 0
PH= −log
10
​
[H
+
]
= −log
10
​
(0.001)
= −log
10
​
(10
−3
)
= −(−3)log
10
​
10
pH=3.
01
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Does the mass of water increase or decrease when it changes to ice
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Answer:

The mass stays the same only volume changes, the volume decreases

Explanation:

The ice shrinks (decreases volume) and becomes more dense. The weight will not (and cannot) change.

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Se construye una pila galvánica con una barra de cobre sumergida en una disolución 1M de cationes Fe+2 y una barra de plata sume
pashok25 [27]

Answer:

El potencial celular estándar, E_{cell} is +0.46 V

Explanation:

Las reacciones de media célula son;

Media reacción del ánodo Cu²⁺ + 2e⁻ ↔ Cu, E ° = 0.34 V

Media reacción catódica 2Ag + 2e⁻ ⁻ 2Ag, E ° = 0.80 V

Sin embargo tenemos para hierro Fe²⁺ + 2e⁻ ↔ Fe, E ° -0.44 V

y Fe³⁺ + e⁻ ↔ Fe²⁺, E ° = 0.77 V

 que es más alta que la del cobre presente, por lo tanto, el cobre se oxidará en el ánodo

Por lo tanto, en el ánodo, tendremos

Cu → Cu²⁺ + 2e⁻ (E ° = -0.34 V)

En el cátodo

2Ag + 2e⁻ → 2Ag (E ° = 0.80 V)

E_{cell} = E_c + E_a = -0.34 + 0.8 = +0.46 \, V

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3 years ago
Which properties determines the element that an atom Is?
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The answer would be C. Number of protons in the atom.

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All of the physical and biological factors in it's environment, I think this is the answer, but I might be wrong.

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Calculate the molarity of a solution that contains 3.00 grams Na2SO4 in 25 mL of solution.
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Answer:

M Na2SO4 sln = 0.8448 M

Explanation:

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