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rachie19
 one year ago
What is the chemical formula for the compound formed between chromium(III) and the iodate ion?
rachie19
 one year ago
What is the chemical formula for the compound formed between chromium(III) and the iodate ion?

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aaronq
 one year ago
Best ResponseYou've already chosen the best response.1Chromium(III) has 3 positive charges (which is indicated by the roman numerals in parentheses). The iodate ion, being in group 7, tends to gain an electron (to complete it's octet) and becomes a negative ion with a charge of 1. The formula needs to be an electrically neutral/balanced compound, so we need as many negative charges as positive charges. 1 \(Cr^{3+}\) has 3+ 1 \(I^\) has 1 we need 3 \(I^\) to make 3 and balance the 3+ from \(Cr^{3+}\). the formula is \(\sf CrI_3\)
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