• anonymous
Two compounds have formulas A_2B_6 and CD_3. One of these compounds is ionic, and the other is molecular. a) How can you tell which is ionic? b) For the ionic, if the negative has a -1 charge, what is the charge of the positive? c) Suggest two ions that might form this compound.
  • Stacey Warren - Expert
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  • katieb
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  • JFraser
Ionic compounds rarely have formulas that can be further reduced to smaller whole s. NaCl is 1:1, K2O is 2:1, FeCl3 is 1:3. The most likely ionic compound is CD3, since A2B6 could be reduced further to AB3, but it's specifically listed as 2:6. If ion D has a -1 charge, then ion C must have a charge of +3 to balance, since there are 3 D ions but only 1 C ion to balance the charge.
  • anonymous
Thanks! That's what I thought but wanted to make sure.

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