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Chemistry 9 Online
OpenStudy (anonymous):

What would be the formula of the compound iron (III) phosphide?

OpenStudy (joannablackwelder):

Iron (III) is \[Fe ^{3+}\]

OpenStudy (joannablackwelder):

Phosphide is\[P ^{3-}\] since it is in group 5A

OpenStudy (joannablackwelder):

When ions make a compound, they combine so that the charges cancel out. Since +3 + (-3) = 0, they combine in a ratio of 1:1.

OpenStudy (joannablackwelder):

So, what do you think the formula would be?

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