How many mL of 0.0500 M phosphoric acid are needed to react completely with 50.0 mL of 0.150 M barium hydroxide solution?

Question

Balanced Equation: 3Ba(OH)_2(aq) + 2H₃PO_4(aq) → Ba₃(PO₄)_2(s) + 6H₂O_(l)

Answer 1

molar ratio Ba(OH)₂/H₃PO₄=3/2

mMoles of Ba(OH)₂ is 50*0.15=7.5 mMol

Using V represent volume of H₃PO₄ in ml

7.5/(V*0.05)=3/2

H₃PO₄ volume V=7.5/0.05*2/3=100 ml