Question

One mole of which can produce maximum number of chloride ions when dissociated in water? A )Sodium chloride, B )Ammonium chloride ,С )Calcium chloride ,D )Aluminium chloride​

Answer 1

One mole of Aluminum chloride can produce a maximum number of chloride ions when dissociated in water. (Option D)

• One mole of any compound contains a fixed number of atoms, that is 6.022 x 10^23 atoms (Avogadro's number), irrespective of the type, structure, number of constituent atoms, etc.
• The chemical formula of Sodium chloride is NaCl. This means each molecule of NaCl has only one constituent chlorine atom or ion. So, one mole of NaCl atoms can give only one mole of chloride ions on dissociation in water.
• The chemical formula of Ammonium chloride is NH4Cl. This means each molecule of NH4Cl has only one constituent chlorine atom or ion. So, one mole of NH4Cl atoms can give only one mole of chloride ions on dissociation in water.
• The chemical formula of Calcium chloride is CaCl2. This means each molecule of CaCl2 has two constituent chloride atoms or ions. So, one mole of CaCl2 atoms can give two moles of chloride ions on dissociation in water.
• The chemical formula of Aluminium chloride is AlCl3. This means each molecule of CaCl2 has three constituent chloride atoms or ions. So, one mole of AlCl3 atoms can give three moles of chloride ions on dissociation in water.
• Hence, on comparing all four molecules, we get Aluminium chloride as the final answer.

Answer 2

One mole of (D) Aluminium chloride can produce a maximum number of chloride ions when dissociated in water.

Atoms in Compounds

One mole contains a fixed number of $6.022 x 10^{23}$ atoms. This is known as the Avogadro's number. A compound contains a fixed number of atoms irrespective of its type, structure, number of constituent atoms etc.

Number of Atoms in each compound:

1. For option A, i.e., Sodium Chloride, we know that it is written as NaCl. This means that there is only one atom of Cl in this compound. Thus, one mole of NaCl atom will give only one chloride ion when dissociated in water.
2. For option B, i.e., Ammonium Chloride, we know that it is written as NH4Cl. This means that there is only one atom of Cl in this compound. Thus, one mole of NH4Cl atom will give only one chloride ion when dissociated in water.
3. For option C, i.e., Calcium Chloride, we know that it is written as CaCl2. This means that there are only two atoms of Cl in this compound. Thus, one mole of CaCl2 atom will give only two chloride ions when dissociated in water.
4. For option D, i.e., Aluminium Chloride, we know that it is written as AlCl3. This means that there are three atoms of Cl present in this compound. Thus, one mole of AlCl3 will give three chloride ions when dissociated in water.

Therefore, on comparison and analysis, the answer is Aluminium Chloride, as it gives the highest number of Chloride ions i.e., three chloride ions upon dissociation in water.