How many moles of chloride ions are present in 2 moles of calcium chloride (CaCl_2)?

• A. 3 moles
• B. 2 moles
• C. 1 mole
• D. 4 moles

Answer: (D)

Verified step by step guidance

1. Identify the chemical formula of calcium chloride, which is \(\mathrm{CaCl_2}\). This means each formula unit contains 1 calcium ion (\(\mathrm{Ca^{2+}}\)) and 2 chloride ions (\(\mathrm{Cl^-}\)).
2. Understand that the number of moles of chloride ions depends on the number of moles of calcium chloride and the ratio of chloride ions per formula unit.
3. Set up the relationship: Number of moles of chloride ions = (Number of moles of \(\mathrm{CaCl_2}\)) \(\times\) (Number of chloride ions per formula unit).
4. Substitute the given values: Number of moles of chloride ions = 2 moles \(\times\) 2 (since there are 2 chloride ions in each \(\mathrm{CaCl_2}\)).
5. Calculate the product to find the total moles of chloride ions present in 2 moles of calcium chloride.