% glycolic acid needed to replace 40% phosphoric acid

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To determine the percentage of glycolic acid needed to replace 40% phosphoric acid by weight, the conversion from weight% to molarity is essential. The phosphoric acid's molarity is calculated to be 5.11 mol/L, considering its triprotic nature, which requires multiplying the molarity by 3 for the equivalent glycolic acid molarity. The discussion seeks clarification on the correct approach to find the necessary glycolic acid percentage, emphasizing the need for precise numerical values. Accurate calculations and conversions are crucial for achieving the desired replacement ratio. The thread highlights the importance of understanding acid properties in such conversions.
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Homework Statement


What is the % glycolic acid needed to replace 40% phosphoric acid (assuming it is weight%)?

Homework Equations

The Attempt at a Solution


I tried to solve this by first converting the Phosphoric acid weight% to mol/L for the phosphoric acid (5.11 mol/L)..
Since phosphoric acid is triprotic, I just multiply by 3 the calculated Molarity of phosphoric acid for the molarity of glycolic acid ... I am not sure if i did it right...how do we find the answer?
 
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Need some numbers. Your numbers. Not mine.
 
That is all the numbers for the question...
 
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