Ask Question
15 February, 11:36

If the reaction yield is 94.4%, what mass in grams of hydrogen is produced by the reaction of 4.73 g of magnesium with 1.83 g of water? mg (s) + 2h2o (l) →mg (oh) 2 (s) + h2 (g)

+2
Answers (1)
  1. 15 February, 14:03
    0
    First, it is important to list the molar mass of the relevant substances.

    Molar mass of magnesium = 24.305 g/mol

    Molar mass of water = 18.0153 g/mol

    Molar mass of H2 = 2.0159 g/mol

    Second, we need to determine the limiting reactant for the chemical reaction. We take 4.73 g of Mg and determine the stoichiometric amount of water needed for it to be completely consumed. This is shown in the following equation:

    4.73 g Mg x mol Mg/24.305 g x 2 mol H2O/1 mol Mg x 18.0153 g/mol H2O = 7.0119 g H2O

    Thus, we have determined that 7.0119 g H2O is needed to completely react 4.73 g Mg. The given amount of 1.83 g H2O is insufficient which then indicates that water is the limiting reactant and should be the basis of our calculations.

    Next, given 1.83 g H20, we calculate the theoretical yield of hydrogen gas using stoichiometry. The equation is then:

    1.83 g H2O x mol H20/18.0153 g x 1 mol H2/2 mol H2O x 2.0159 g/mol H2 = 0.1024 g H2

    However, the reaction yield was given to be 94.4%. The reaction yield is given by the formula percent yield = actual yield / theoretical yield x 100%. Thus, the actual yield of hydrogen gas can be determined using the formula.

    Actual yield of H2 = 0.94*0.1024 g H2

    Thus, the amount of hydrogen gas produced is 0.0963 g.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “If the reaction yield is 94.4%, what mass in grams of hydrogen is produced by the reaction of 4.73 g of magnesium with 1.83 g of water? mg ...” in 📘 Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers