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Illusion [34]
4 years ago
14

How many moles of calcium chloride (CaCl2) are needed to react completely with 6.2 moles of silver nitrate (AgNO3)?

Chemistry
1 answer:
soldier1979 [14.2K]4 years ago
7 0

Answer:

The no. of moles of CaCl₂ are needed = 3.1 mol.

Explanation:

  • From the balanced reaction:

<em>2AgNO₃ + CaCl₂ → 2AgCl + Ca(NO₃)₂,</em>

It is clear that 2 mol of AgNO₃ react with 1 mol of CaCl₂ to produce 2 mol of AgCl and 1 mol of Ca(NO₃)₂.

<u><em>Using cross multiplication:</em></u>

2 mol of AgNO₃ need  → 1 mol of CaCl₂ to react completely, from stichiometry.

6.2 mol of AgNO₃ need  → ??? mol of CaCl₂ to react completely.

∴ The no. of moles of CaCl₂ are needed = (1 mol)(6.2 mol)/(2 mol) = 3.1 mol.

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