Aqueous solutions of 30% (by weight)hydrogen peroxide,H₂O₂,are used to oxidize metals or organic molecules in chemical reactions.Given that the density of the solution is 1.11 g/mL,calculate the molarity. A)0.794 M B)6.78 M C)9.79 M D)12.6 M

Question

Quizplus · Accepted Answer

To calculate the molarity of a solution, we need to know the number of moles of solute (in this case, hydrogen peroxide) per liter of solution.

First, we need to convert the percentage by weight to grams of hydrogen peroxide per 100 grams of solution:

30 g H2O2 / 100 g solution

Next, we need to use the density to convert the volume of the solution to mass:

1 mL solution x 1.11 g/mL = 1.11 g solution

Now we can calculate the number of moles of hydrogen peroxide:

30 g H2O2 / 34.01 g/mol = 0.882 moles H2O2

Finally, we can calculate the molarity:

0.882 moles H2O2 / 0.090 L solution = 9.79 M

Therefore, the correct answer is C (9.79 M).

Aqueous Solutions of 30% (By Weight)hydrogen Peroxide,H2O2,are Used to Oxidize

Aqueous Solutions of 30% (By Weight)hydrogen Peroxide,H₂O₂,are Used to Oxidize