Ask Question
20 April, 09:07

The weight percent of concentrated HClO4 (aq) is 70.5% and its density is 1.67 g/mL. What is the molarity of concentrated HClO4

+2
Answers (1)
  1. 20 April, 11:16
    0
    [HClO₄] = 11.7M

    Explanation:

    First of all we need to know, that a weight percent represents, the mass of solute in 100 g of solution.

    Let's convert the mass to moles → 70.5 g. 1mol/100.45 g = 0.702 moles

    Now we can apply the density to calculate the volume.

    Density always refers to solution → Solution density = Solution mass / Solution volume

    1.67 g/mL = 100 g / Solution volume

    Solution volume = 100 g / 1.67 g/mL → 59.8 mL

    To determine molarity (mol/L) we must convert the mL to L

    59.8 mL. 1L/1000mL = 0.0598 L

    Molarity → Moles of solute in 1L of solution → 0.702 mol / 0.0598 L = 11.7M
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “The weight percent of concentrated HClO4 (aq) is 70.5% and its density is 1.67 g/mL. What is the molarity of concentrated HClO4 ...” in 📙 Chemistry if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers