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Kaylis [27]
2 years ago
14

What is the ph of a solution with a hydroxyl ion (oh-) concentration of 10-10 m? what is the ph of a solution with a hydroxyl io

n (oh-) concentration of 10-10 m? ph 10 ph 12 ph 4 ph 2?
Chemistry
2 answers:
loris [4]2 years ago
7 0
PH is the potential of hydrogen. 
pH = -log₁₀(H+) 
while, pOH = -log₁₀(OH-)
But; pH + pOH =14
Therefore; for a solution with a concentration of (OH-) of 10^-10
The pOH= -log(10^-10)
              = 10 
Therefore pH =14-10
                      = 4
krek1111 [17]2 years ago
3 0
According to this formula:
pH = - log [H]
And, pOH = - log [OH] >>> (1)
Where, pH + pOH = 14  >>> (2)
∵ the hydroxide ion concentration = (OH-) = 10 ^ -10 M
from (1) and (2) and by substitution: 
∴ pOH = - log [10^-10] = 10 
∴ pH = 14 - 10 = 4 
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Select the correct balanced oxidation-reduction reaction. Group of answer choices 14H+(aq) + 6Fe2+(aq) + Cr2O72-(aq) -&gt; 6Fe3+
bezimeni [28]

Answer:

The correct balanced oxidation- reduction reaction is:

14H+(aq) + 6Fe2+(aq) + Cr2O72-(aq) -> 6Fe3+(aq) + 2Cr3+(aq) + 7H2O(l)

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In this reaction, iron (Fe2+) is the reducing agent while Cr2O7^2- is the oxidizing agent.

The ion transfer is represented as shown below:

6 Fe 2+  - 6e- -----------> 6 Fe 3+          (oxidation)

2 Cr^6  + 6e^-  ----------> 2 Cr^3           (reduction)

From the unbalanced reaction

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Step 2: Balance the atoms on each sides; the hydrogen, oxygen

Step 3: Balance the gain also

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6 0
2 years ago
A certain first-order reaction 45% complete in 65seconds, determine the rate constant and the half life for the process ​
masha68 [24]

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<h3>Further explanation</h3>

Given

Reaction 45% complete in 65 s

Required

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Solution

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45% complete, 55% remains

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Akimi4 [234]
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</span><span>x = 14/.8
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</span>
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3 years ago
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