# Chemistry

how to prepare and calculate 10%,20% and 30% of phosphoric acid from the concentrated? Meaning that if 10% = 10%phosporic acid+90% of water. let say i want to prepare in volume of 250ml.

given,

Formula: H3PO4
Melting point: 42.35 °C
Density: 1.88 g/cm³
Molar mass: 98 g/mol

1. 👍
2. 👎
3. 👁
1. I don't get it. What's to calculate?
10% phosphoric acid = 10g H3PO4 + 90 g H2O or 10g/100 g soln. You want about 250 grams of solution so
10g x (250/100) = 25 g H3PO4
This won't be exactly 250 mL; you could take that into account if you knew the density of the 10% solution.

1. 👍
2. 👎
2. 50 LITER WATER HOW MUCH WATER

1. 👍
2. 👎

## Similar Questions

1. ### chemistry

how would you prepare 1.00 L of a .50M solution of H2SO4 from concentrated (18M) sulfric acid?

2. ### Chemistry

Ca3(PO4)2 + 3 H2SO4 -> 3 CaSO4 + 2 H3PO4 What masses of calcium sulfate and phosphoric acid can be produced from the reaction of 1.0 kg calcium phosphate with 1.0 kg concentrated sulfuric acid (98% H2SO4 by mass)?

3. ### Chemistry

How much concentrated solution would you take to prepare 2.80L of 0.475M HCl by mixing with water? Hydrochloric acid is usually purchased in a concentrated form that is 37.0% HCl by mass and has a density of 1.20g/mL.

4. ### Chemistry -pls help urgent

1) How do I prepare 2M nitric acid from 65% concentrated nitric acid? 2) How do I prepare 17% ammonia from 25% concentrated ammonia? Please show calculation steps. Thanks.

1. ### Chemistry

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. kPa1: 2.16 kPa2: 7.21

2. ### Chemistry

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. pKa1: 2.16 pKa2: 7.21

3. ### organic chemistry

1. why is phosphoric acid needed in the synthesis of aspirin? 2.what would happen if the phosphoric acid is left out?

4. ### Chemistry

How much of each of the following substances would you add to water to prepare 1.90 L of a 0.15 M solution? (a) H2SO4 from "concentrated" (18 M) sulfuric acid mL (b) HCl from "concentrated" (12 M) reagent mL (c) NiCl2 from the

1. ### 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.?

2. ### Chemistry!!

A chemist wants to prepare a stock solution of H2SO4 so that a sample of 20.00mL will produce a solution with a concentration of .50 M when added to 100.0mL of water. A)what should the molarity of the stock solution be? B)If the

3. ### AP Chem

Consider the following unbalanced equation: Ca3(Po4)2+H2SO-->CaSO4+H3PO What masses of calcium sulfate and phosphoric acid can be produced from the reaction of 1.0 kg calcium phosphate with 1.0 kg concentrated sulfuric acid (98%

4. ### Chemistry

Calculate the volume of concentrated reagent required to prepare the diluted solutions indicated: (a) 18 M H2SO4 to prepare 225 mL of 2.0 M H2SO4 (