# Chemistry

posted by .

How to calculate the molarity of phosphoric aci9d in a solution that is 84% by mass phosphoric acid and a density of 1.87 g/ml

• Chemistry -

84% by mass H3PO4 means 84 g H3PO4 in 100 g solution. M = moles/L.
How many moles are in 84g H3PO4? That is 84/molar mass H3PO4.
What is the volume of 100 g soln.
mass = volume x density. You know mass and density, solve for volume.
Then M = #moles/L

## Similar Questions

1. ### College Chemistry

Phosphoric Acid is usually obtained at an 85% phosphoric acid solution, by mass. If this solution is 15 M, what is the density of the solution?
2. ### Chemistry

Given a 2.5 kg solution of phosphoric acid and water (56 % phophoric acid, by mass), calculate the number of moles of phosphoric acid.
3. ### chemistry

Calculate the molarity of a phosphoric acid(H3PO3)solution that is 84% by mass phosphoric acid and has a density of 1.87g/mL.?
4. ### Chemistry

Givien a 2.0kg solution of phosphoric acid and water 53% phosphoric acid by mass calculate the number of moles of phosphoric acid
5. ### Chemistry

Givien a 2.0kg solution of phosphoric acid and water 53% phosphoric acid by mass calculate the number of moles of phosphoric acid
6. ### Chemistry lab

1) Using the 1st equivalence point from part a calculate the molarity of the phosphoric acid. Molarity of NaOH = .1523 M Volume of phosphoric acid used 10.0mL Volume at equivalence point 7.410 mL and 14.861 mL 2) Using the 2nd equivalence …
7. ### general chemistry II

Phosphoric Acid is usually obtained at an 85% phosphoric acid solution, by mass. If this solution is 15 M, what is the density of the solution?
8. ### Science

Concentrated phosphoric acid is 90% by mass and the remaining mass is water.The molarity of phosphoric acid in 90% is 12.2M at rtp. a)What is the density of the solution at rtp ?
9. ### chemistry

A 43.20 mL sample of 0.3260 M sodium hydroxide (NaOH) is required to react completely with 36.70 mL of a phosphoric acid (H3PO4) solution. What is the molarity of the phosphoric acid solution?
10. ### Chemistry

I am using 85% ACS grade phosphoric acid. I need to make a 21% phosphoric acid solution with a total volume of 250ml. I have been told that 37ml of the 85% ACS grade phosphoric acid plus 188ml of Deionized water will create the 21% …

More Similar Questions