The correct formula unit of an ionic compound from the options provided is Ca(OH)2.
Here's a breakdown of the other options:
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Al2F3: This formula is actually not a valid representation of an ionic compound. The correct formula for aluminum fluoride should be AlF3, as aluminum has a +3 charge and fluoride has a -1 charge.
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Ca2O: This is incorrect as well. Calcium has a +2 charge and oxygen has a -2 charge, so the correct formula should be CaO.
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Ca(OH)2: This is correct. It represents calcium hydroxide, which is an ionic compound with Ca^2+ and OH^- ions.
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KCl2: This is incorrect. Potassium has a +1 charge and chlorine has a -1 charge, so the correct formula for potassium chloride should be KCl.
Therefore, the only correct formula unit for an ionic compound in your list is Ca(OH)2.
1 answer