0.05 liters of 0.40 M calcium chloride solution
Explanation:
We have the following chemical reaction:
Na₂CO₃ + CaCl₂= 2 NaCl + CaCO₃
Chalk is calcium carbonate CaCO₃.
number of moles = mass / molecular weight
number of moles of CaCO₃ = 2 / 100 = 0.02 moles
From the chemical reaction we see that 1 mole of calcium chloride (CaCl₂) produces 1 mole of calcium carbonate (CaCO₃), so to produce 0.02 moles of calcium carbonate (CaCO₃) we need 0.02 moles of calcium chloride (CaCl₂).
molar concentration = number of moles / volume (L)
volume = number of moles / molar concentration
volume of calcium chloride solution = 0.02 / 0.4 = 0.05 liters
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molar concentration
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