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The number of moles of positive ions in 0.25 moles of aluminum sulfate is A - Scottish Highers Chemistry - Question 24 - 2023

Question 24

The number of moles of positive ions in 0.25 moles of aluminum sulfate is A. 0.5 B. 1.0 C. 2.0 D. 3.0

Worked Solution & Example Answer:The number of moles of positive ions in 0.25 moles of aluminum sulfate is A - Scottish Highers Chemistry - Question 24 - 2023

Step 1

Understanding Aluminum Sulfate Formula

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Answer

Aluminum sulfate has the chemical formula ext{Al}_2( ext{SO}_4)_3. This means that for every 1 formula unit of aluminum sulfate, there are 2 aluminum ions (Al³⁺) and 3 sulfate ions (SO₄²⁻). The total number of positive ions must be calculated from the aluminum ions.

Step 2

Calculating Moles of Positive Ions

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Answer

Since each mole of aluminum sulfate produces 2 moles of aluminum ions, the number of moles of positive ions can be calculated as follows: $ext{Number of moles of positive ions} = 2 imes ext{moles of aluminum sulfate}$ Substituting the given value: $ext{Number of moles of positive ions} = 2 imes 0.25 = 0.5$

Step 3

Final Answer

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Answer

Therefore, the number of moles of positive ions in 0.25 moles of aluminum sulfate is 0.5.

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