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The theoretical yield of a substance is the amount of the mass that is calculated from stoichiometry. The mass of sodium chloride produced is 13.03 gms.
What is mass?
Mass of the substance is a multiplication of the molar mass and moles.
The balanced reaction is given as:
CuCl₂ + 2NaNO₃ ⇒ 2NaCl + Cu(NO₃)₂
Moles of copper chloride are calculated as: 15 ÷ 134.45 = 0.115 moles
Moles of sodium nitrate are calculated as: 20 ÷ 84.99 = 0.2353 moles
From the reaction, 1 mole of copper chloride gives 2 moles of sodium chloride so, 0.115 moles of copper chloride will produce 0.223 moles.
Similarly, 2 moles of sodium nitrate produce 2 moles of sodium chloride so, 0.2353 moles produce 0.4706 moles.
From this, it can be concluded that copper chloride is a limiting reagent and will be used to calculate the mass of NaCl.
Mass of NaCl is calculated as: Mass = 0.223 moles × 58.44 = 13.03 gms.
Therefore, 13.03 gms is the theoretical yield of sodium chloride.
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