1. name each of the following ionic compounds: (a) mgbr₂ (b) khso₄ (c) (nh₄)₃po₄ (d) ca(oh)₂ 2. name each of the following molecular compounds: (a) cf₄ (b) ph₃ (c) p₄o₁₀ (d) pcl₃ (e) n₂f₄ (f) o₂f₂ 3. copy the following list of compounds in your notebook. identify each compound as ionic or molecular. mark the binary compounds with an asterisk (*). name each compound using the appropriate method. (a) p₂o₅ (b) caso₄ (c) kno₃ (d) mgi₂ 4. write the formula for each of the following compounds: (a) phosphorus pentachloride (b) sulfur hexafluoride (c) nitrogen trifluoride (d) silicon tetrafluoride (e) silver phosphate (f) manganese(ii) dichromate (g) sodium perchlorate (h) cobalt(ii) permanganate 5. write the systematic name for each of the following substances: (a) water, h₂o (b) ammonia, nh₃ (c) potash, k₂co₃ (d) lye, naoh 6. thinking critically explain why a standard naming system is important for international communication, safety, and efficiency.

Question

Accepted Answer

### 1. Naming ionic compounds
- **(a) $MgBr_2$**
  - **Explanation**: Magnesium ($Mg$) is a metal with a $+ 2$ charge and bromine ($Br$) is a non - metal. The name is magnesium bromide.
- **(b) $KHSO_4$**
  - **Explanation**: The cation is potassium ($K^+$) and the polyatomic anion is hydrogen sulfate ($HSO_4^-$). The name is potassium hydrogen sulfate.
- **(c) $(NH_4)_3PO_4$**
  - **Explanation**: The cation is ammonium ($NH_4^+$) and the anion is phosphate ($PO_4^{3 -}$). The name is ammonium phosphate.
- **(d) $Ca(OH)_2$**
  - **Explanation**: The cation is calcium ($Ca^{2+}$) and the anion is hydroxide ($OH^-$). The name is calcium hydroxide.

### 2. Naming molecular compounds
- **(a) $CF_4$**
  - **Explanation**: Carbon is the first element and there is 1 carbon atom. Fluorine is the second element and there are 4 fluorine atoms. The name is carbon tetrafluoride.
- **(b) $PH_3$**
  - **Explanation**: Phosphorus is the first element and there is 1 phosphorus atom. Hydrogen is the second element and there are 3 hydrogen atoms. The name is phosphorus trihydride (commonly called phosphine).
- **(c) $P_4O_{10}$**
  - **Explanation**: There are 4 phosphorus atoms and 10 oxygen atoms. The name is tetraphosphorus decoxide.
- **(d) $PCl_3$**
  - **Explanation**: There is 1 phosphorus atom and 3 chlorine atoms. The name is phosphorus trichloride.
- **(e) $N_2F_4$**
  - **Explanation**: There are 2 nitrogen atoms and 4 fluorine atoms. The name is dinitrogen tetrafluoride.
- **(f) $O_2F_2$**
  - **Explanation**: There are 2 oxygen atoms and 2 fluorine atoms. The name is dioxygen difluoride.

### 3. Classifying and naming compounds
- **(a) $P_2O_5$**
  - **Type**: Molecular
  - **Name**: Diphosphorus pentoxide
  - **Binary**: Yes (marked with *)
- **(b) $CaSO_4$**
  - **Type**: Ionic
  - **Name**: Calcium sulfate
  - **Binary**: No
- **(c) $KNO_3$**
  - **Type**: Ionic
  - **Name**: Potassium nitrate
  - **Binary**: No
- **(d) $MgI_2$**
  - **Type**: Ionic
  - **Name**: Magnesium iodide
  - **Binary**: Yes (marked with *)

### 4. Writing formulas
- **(a) Phosphorus pentachloride**: $PCl_5$
- **(b) Sulfur hexafluoride**: $SF_6$
- **(c) Nitrogen trifluoride**: $NF_3$
- **(d) Silicon tetrafluoride**: $SiF_4$
- **(e) Silver phosphate**: $Ag_3PO_4$
- **(f) Manganese(II) dichromate**: $MnCr_2O_7$
- **(g) Sodium perchlorate**: $NaClO_4$
- **(h) Cobalt(II) permanganate**: $Co(MnO_4)_2$

### 5. Writing systematic names
- **(a) $H_2O$**: Dihydrogen monoxide (commonly called water)
- **(b) $NH_3$**: Nitrogen trihydride (commonly called ammonia)
- **(c) $K_2CO_3$**: Potassium carbonate (potash is a common name, systematic name is potassium carbonate)
- **(d) $NaOH$**: Sodium hydroxide (lye is a common name, systematic name is sodium hydroxide)

### 6. Importance of standard naming system
- **Brief Explanations**: A standard naming system is important for international communication as it provides a common language for chemists worldwide. For safety, it ensures that substances are clearly identified to prevent accidents in handling and storage. In terms of efficiency, it allows for quick and accurate identification of substances in research, industry, and education.
- **Answer**: A standard naming system is crucial for clear international communication, safety in handling substances, and efficiency in various chemical - related activities.

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QUESTION IMAGE

Question

Explanation:

1. Naming ionic compounds

2. Naming molecular compounds

3. Classifying and naming compounds

4. Writing formulas

5. Writing systematic names

6. Importance of standard naming system

Answer: