142k views
2 votes
What is the molarity of an h3po4 solution if 15.0 ml is completely neutralized by 38.5 ml of 0.150m naoh?

1 Answer

5 votes
The molarity of H3PO4 solution if 15.0 ml is completely neutralized by 38.5 ml of 0.15m naoh is calculated as follows
find moles of NaOH used = molarity x volume
= 38.5 x 0.15 = 5.775 moles

write the reacting equation
3NaOH + H3PO4 = Na3PO4 + 3H2O

from the equation the reacting ratio between NaOH to H3Po4 which is 3:1 the moles of H3PO4 is therefore = 5.775/3 = 1.925 moles

molarity of H3PO4 is therefore = moles /volume
= 1.925/15 = 0.128 M
User Lode
by
8.5k points

Related questions

1 answer
1 vote
39.6k views
1 answer
4 votes
208k views
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.