10. Determine limiting reagent, excess reagent, theoretical yield, percent yield

ID: 1050526 • Letter: 1

Question

10. Determine limiting reagent, excess reagent, theoretical yield, percent yield, and amount of excess reactant remaining.

(25 points total)

Hydrogen chloride can be prepared by the reaction of 2.oo moles H2SO4 and 2.57 moles NaCl? :

NaCl + H2SO4 à HCl + Na2SO4

Balance the equation.

Which reactant is the limiting reagent? _______________________

Which reactant is the excess reagent? _______________________

What is the theoretical yield in moles (in three significant digits) of HCl?

______________________

What is the percent yield (in three significant digits) if the actual yield is 1.83 moles?

______________________

Use the space below to show your work for questions b-e. Write the answers in the blanks above.

The balanced reaction is :-

2NaCl + H2SO4 ----------------------->Na2SO4 + 2HCl

2 moles of sulphuric acid and 2.57 moles of NaCl is given .

One mole of sulphuric acid requires 2 moles of NaCl

limiting reagent = NaCl

Excess reagent = H2SO4

2 moles of NaCl gives 2 moles of HCl

so, 2.57 moles will give 2.57 moles of HCl

% yield = 1.83 x 100 / 2.57 = 71.2 %

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