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
Determine the Composition of Aluminum Sulfate
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Answer
Aluminum sulfate has the chemical formula Al2(SO4)3. From this formula, we can identify the ions present:
2 aluminum ions (each with a +3 charge).
3 sulfate ions (each with a -2 charge).
Thus, the total number of positive ions is 2.
Step 2
Calculate Moles of Positive Ions
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Answer
Given that the number of moles of aluminum sulfate is 0.25, we can calculate the number of moles of positive ions:
[ 0.25 , \text{moles of aluminum sulfate} \times 2 , \text{moles of Al} = 0.5 , \text{moles of positive ions} ]\
Thus, there are 0.5 moles of positive ions in 0.25 moles of aluminum sulfate.
Step 3
Select the Correct Answer
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Answer
Based on the calculation, the answer is A. 0.5.
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