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Question
regular chemistry
name: savannah jackson date: 10/10 class: 4th
unit 2 - hw 3
ws 2: ionic bonding with transition metals and polyatomic ions
make sure you use the criss cross method correctly, and use the naming rules to name correctly.
- metal names stay the same
- nonmetals must get the suffix of -ide
- transition metals (groups 3 - 12) must have roman numerals in their name
- chromium (ii) → (ii) tells you that this chromium has a +2 charge
- you can figure out the charge of the transition metal by completing the criss cross method backwards. the subscript on the nonmetal would become the charge for the transition metals
- polyatomic ions are units, and should not be separated.
- use your reference sheet to figure out the name or formula for the polyatomic ion.
- if there are multiples of the polyatomic ion, put the polyatomic ion in parentheses
to complete the table below:
- you will break into your lab groups.
- at each station are 4 cards with names on them and numbers. those numbers correspond to the question name on the table below.
- complete the compound using the cards at the stations. determine the formula and compound name for each.
| metal or transition metal | nonmetal or polyatomic ion | formula | compound name |
|---|---|---|---|
| 2. calcium | cacn | calcium chloride | |
| 3. copper (ii) | |||
| 4. lead (iv) | |||
| 5. nitride | |||
| 6. borate | |||
| 7. iodide | |||
| 8. sulfite |
Step1: Determine calcium's charge
Calcium is in Group 2, so it has a +2 charge ($Ca^{2 +}$). Chloride is $Cl^{-}$.
Step2: Apply criss - cross method
The 1 from $Cl^{-}$ goes to calcium and the 2 from $Ca^{2 +}$ goes to chlorine. The formula is $CaCl_{2}$.
Step3: Name the compound
Calcium is the metal (name stays the same) and chlorine is the non - metal which gets the suffix -ide. The name is calcium chloride.
Step4: Determine copper(II) charge
Copper(II) has a +2 charge ($Cu^{2+}$). Let's assume chloride ($Cl^{-}$) for now.
Step5: Apply criss - cross method for copper(II)
The 1 from $Cl^{-}$ goes to copper and the 2 from $Cu^{2 +}$ goes to chlorine. The formula is $CuCl_{2}$. The name is copper(II) chloride.
Step6: Determine lead(IV) charge
Lead(IV) has a +4 charge ($Pb^{4+}$). For chloride ($Cl^{-}$), applying criss - cross method, the 1 from $Cl^{-}$ goes to lead and the 4 from $Pb^{4 +}$ goes to chlorine. The formula is $PbCl_{4}$. The name is lead(IV) chloride.
Step7: For nitride ($N^{3-}$)
- With sodium ($Na^{+}$), applying criss - cross method, the formula is $Na_{3}N$ and the name is sodium nitride.
- With calcium ($Ca^{2+}$), the formula is $Ca_{3}N_{2}$ and the name is calcium nitride.
- With copper(II) ($Cu^{2+}$), the formula is $Cu_{3}N_{2}$ and the name is copper(II) nitride.
- With lead(IV) ($Pb^{4+}$), the formula is $Pb_{3}N_{4}$ and the name is lead(IV) nitride.
Step8: For borate ($BO_{3}^{3 -}$)
- With sodium ($Na^{+}$), the formula is $Na_{3}BO_{3}$ and the name is sodium borate.
- With calcium ($Ca^{2+}$), the formula is $Ca_{3}(BO_{3})_{2}$ and the name is calcium borate.
- With copper(II) ($Cu^{2+}$), the formula is $Cu_{3}(BO_{3})_{2}$ and the name is copper(II) borate.
- With lead(IV) ($Pb^{4+}$), the formula is $Pb_{3}(BO_{3})_{4}$ and the name is lead(IV) borate.
Step9: For iodide ($I^{-}$)
- With sodium ($Na^{+}$), the formula is $NaI$ and the name is sodium iodide.
- With calcium ($Ca^{2+}$), the formula is $CaI_{2}$ and the name is calcium iodide.
- With copper(II) ($Cu^{2+}$), the formula is $CuI_{2}$ and the name is copper(II) iodide.
- With lead(IV) ($Pb^{4+}$), the formula is $PbI_{4}$ and the name is lead(IV) iodide.
Step10: For sulfite ($SO_{3}^{2 -}$)
- With sodium ($Na^{+}$), the formula is $Na_{2}SO_{3}$ and the name is sodium sulfite.
- With calcium ($Ca^{2+}$), the formula is $CaSO_{3}$ and the name is calcium sulfite.
- With copper(II) ($Cu^{2+}$), the formula is $CuSO_{3}$ and the name is copper(II) sulfite.
- With lead(IV) ($Pb^{4+}$), the formula is $Pb(SO_{3})_{2}$ and the name is lead(IV) sulfite.
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| Metal or Transition Metal | Nonmetal or Polyatomic ion | Formula | Compound Name |
|---|---|---|---|
| Calcium | Chloride | $CaCl_{2}$ | Calcium Chloride |
| Copper(II) | Chloride | $CuCl_{2}$ | Copper(II) Chloride |
| Lead(IV) | Chloride | $PbCl_{4}$ | Lead(IV) Chloride |
| Sodium | Nitride | $Na_{3}N$ | Sodium Nitride |
| Calcium | Nitride | $Ca_{3}N_{2}$ | Calcium Nitride |
| Copper(II) | Nitride | $Cu_{3}N_{2}$ | Copper(II) Nitride |
| Lead(IV) | Nitride | $Pb_{3}N_{4}$ | Lead(IV) Nitride |
| Sodium | Borate | $Na_{3}BO_{3}$ | Sodium Borate |
| Calcium | Borate | $Ca_{3}(BO_{3})_{2}$ | Calcium Borate |
| Copper(II) | Borate | $Cu_{3}(BO_{3})_{2}$ | Copper(II) Borate |
| Lead(IV) | Borate | $Pb_{3}(BO_{3})_{4}$ | Lead(IV) Borate |
| Sodium | Iodide | $NaI$ | Sodium Iodide |
| Calcium | Iodide | $CaI_{2}$ | Calcium Iodide |
| Copper(II) | Iodide | $CuI_{2}$ | Copper(II) Iodide |
| Lead(IV) | Iodide | $PbI_{4}$ | Lead(IV) Iodide |
| Sodium | Sulfite | $Na_{2}SO_{3}$ | Sodium Sulfite |
| Calcium | Sulfite | $CaSO_{3}$ | Calcium Sulfite |
| Copper(II) | Sulfite | $CuSO_{3}$ | Copper(II) Sulfite |
| Lead(IV) | Sulfite | $Pb(SO_{3})_{2}$ | Lead(IV) Sulfite |