Anonymous
Anonymous asked in Science & MathematicsChemistry · 2 months ago

Chem HWK due TODAY Help please ?

Consider the reaction 2 Na+ Cl2 -> 2 NaCl(s) which contains 53.2 g of Na and 65.8 g of Cl2. 

a.  perform the three conversions required to determine the mass of NaCl that would be made if there were more than enough Cl2 

b. Beginning with the mass of Cl2 available, perform the three conversions required to determine the mass of NaCl that would be made if there were more than enough Na. 

c. Which calculation predicts the least amount of product?  

d. What is the limiting reactant? What is the theoretical yield?

Thank you!

1 Answer

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  • 2 months ago
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    Molar mass of Na = 23.0 g/mol

    Molar mass of Cl₂ = 35.5× 2 = 71.0 g/mol

    Molar mass of NaCl = 23.0 + 35.5 = 58.5 g/mol

    2Na + Cl₂ → 2NaCl

    Mole ratio Na : Cl₂ : NaCl = 2 : 1 : 2

    ====

    a.

    (53.2 g Na) × (1 mol Na / 23.0 g Na) × (2 mol NaCl / 2 mol Na) × (58.5 g NaCl / 1 mol NaCl)

    = 135 g NaCl

    ====

    b.

    (65.8 g Cl₂) × (1 mol Cl₂ / 71.0 g Cl₂) × (2 mol NaCl / 1 mol Cl₂) × (58.5 g NaCl / 1 mol NaCl)

    = 108 g NaCl

    ====

    c.

    The calculation in b, beginning with the mass of Cl₂ available, gives the least amount of product.

    ====

    d.

    The limiting reactant is Cl₂.

    The theoretical yield is 108 g.

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