Question
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What is the pH of 0.0050 M Ba(OH)2(aq)

2.00
11.70
2.30
12.00
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Step 1

pH scale is the measure of acidity or basicity for a solution. Acidity is defined by the presence of Hydrogen(H+) ion and basicity is defined by the presence of Hydroxide(OH-) ion in the particular solution.

For Acids it has a value lower than 7.

For Bases it has a value higher than 7.

For Neutral solution has a value 7.

Mathematically- Since, Step 2

For bases calculate the Hydroxide(OH-) ion by using the relation- Since,

Ba(OH)2(aq) completely dissociates can be represented as- Here, 2 moles of OH- ions are present therefore, it becomes

2×0.0050=0.01 moles of OH-

Step 3

To calculate pH first substitute value of OH- ion in pOH equation as mentioned above-    ...

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