Idk what category this question falls however I really need help understanding this. I don't understand this

[attachment id=0 msg=3431]

Why is it a word problem.
Calculate the mass of the given volume of phosphoric acid. Convert this to 100%. With the molar mass you get the moles. The same you do for the hydroxide.  According the chemical reaction you can see 1 H3PO4 need 3 OH-. So that means ratio is 1:3.

Quote from: Harini on October 09, 2022, 02:16:05 PM
Idk what category this question falls however I really need help understanding this. I don't understand this

Use Density = mass / volume to know mass of 10mL of solution. Now in this mass 91.7% is H₃PO₄ .Follow these steps
(density x volume ) g of solution --------> 91.7% of grams of solution is mass of H₃PO₄ -------> moles of H₃PO₄ --------> moles of NaOH -------> grams of NaOH reacted with H₃PO₄
Mass of NaOH left unreacted is 20.0 g - mass of NaOH reacted with acid.