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the II means that the charge of the copper, in this case, is +2, rather than, say, +1, which is copper's other possible charge.

the formula for copper II chloride is CuCl2, rather than copper I chloride, which is simply CuCl.

for all transition metals which have multiple charges, it is necessary to state the particular charge thet the atom is using.

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Q: Why is the II in copper II chloride important?
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Related questions

Is Copper(II) Chloride?

No. Copper(I) chloride and copper(II) chloride are both ionic solids.


What is the chemical formula for copper (II) chloride?

There are two kinds of copper chloride. Copper(I) chloride is CuCl. Copper(II) chloride is CuCl2.


What is produced with iron and copper II chloride?

copper and iron (II) chloride


What are the names of compounds in which copper is found?

Some examples are copper(II) sulfate, copper(I) chloride, copper(II) chloride, copper(II) carbonate.


Is copper chloride liquid?

No. Copper(I) chloride and copper(II) chloride are both ionic solids.


what is the balanced equation for copper(II)oxide and potassium chloride?

The balanced equation for copper(II) oxide and potassium chloride is CuO + 2KCl → CuCl2 + K2O When copper(II) oxide reacts with potassium chloride then it forms copper(II) chloride and potassium oxide.


What is the formulas for the compounds called copper1 chloride and copper 2 chloride?

Copper I Chloride is CuCl and Copper II Chloride CuCl2


Who discovered copper II chloride?

Mr Bob Copper discovered it in 1700. He named it after his son "Chloride" But then chloride died and he had a second son "Chloride II"


Can copper replace hydrogen in HCl?

Copper chlorides: - copper (I) chloride: CuCl - copper (II) chloride: CuCl2


Copper chloride chemical formula?

Copper I Chloride is CuCl - Copper II Chloride (the most probable one) CuCl2


Formula for hydrated copper 2 chloride?

Hydrated copper(II) Chloride - CuCl2.5H2O


What is the state symbol for copper chloride?

CuCl2