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
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.
50 LITER WATER HOW MUCH WATER
To prepare solutions of different concentrations, such as 10%, 20%, and 30% of phosphoric acid, you will need to dilute the concentrated phosphoric acid with water. Here's how you can calculate the amount of each component needed for a 250 ml solution:
1. Calculate the amount of phosphoric acid needed for each concentration:
For a 10% solution:
10% of 250 ml = 0.10 * 250 ml = 25 ml
So, you will need 25 ml of phosphoric acid.
For a 20% solution:
20% of 250 ml = 0.20 * 250 ml = 50 ml
So, you will need 50 ml of phosphoric acid.
For a 30% solution:
30% of 250 ml = 0.30 * 250 ml = 75 ml
So, you will need 75 ml of phosphoric acid.
2. Calculate the amount of water needed for each concentration:
To prepare the desired concentration, you will need to subtract the volume of phosphoric acid from the total volume (250 ml). The remaining volume will be the amount of water.
For a 10% solution:
Water volume = Total volume - Phosphoric acid volume
Water volume = 250 ml - 25 ml = 225 ml
So, you will need 225 ml of water.
For a 20% solution:
Water volume = Total volume - Phosphoric acid volume
Water volume = 250 ml - 50 ml = 200 ml
So, you will need 200 ml of water.
For a 30% solution:
Water volume = Total volume - Phosphoric acid volume
Water volume = 250 ml - 75 ml = 175 ml
So, you will need 175 ml of water.
3. Prepare the solutions:
Now that you have calculated the volumes of phosphoric acid and water, you can measure and mix them to prepare the desired solutions.
For example, to prepare a 10% solution of phosphoric acid:
- Measure 25 ml of concentrated phosphoric acid.
- Add 225 ml of water to the acid and mix well.
Repeat the same steps for the 20% and 30% solutions, using the calculated volumes of phosphoric acid and water for each concentration.
Please note that when working with chemicals, it is always essential to follow proper safety guidelines and wear appropriate protective equipment.
To prepare solutions of different concentrations of phosphoric acid, you will need to know the concentration of the concentrated phosphoric acid you have. Let's assume you have a concentrated phosphoric acid with a concentration of 100%.
To prepare a 10% solution of phosphoric acid, you will need to mix 10% phosphoric acid and 90% water by volume. Since you want to prepare a 250 mL solution, you will need 25 mL of phosphoric acid (10% of 250 mL) and 225 mL of water (90% of 250 mL).
To prepare a 20% solution of phosphoric acid, you will need to mix 20% phosphoric acid and 80% water by volume. For a 250 mL solution, you will need 50 mL of phosphoric acid (20% of 250 mL) and 200 mL of water (80% of 250 mL).
To prepare a 30% solution of phosphoric acid, you will need to mix 30% phosphoric acid and 70% water by volume. For a 250 mL solution, you will need 75 mL of phosphoric acid (30% of 250 mL) and 175 mL of water (70% of 250 mL).
Please keep in mind that when working with concentrated acids, it is important to follow safety precautions such as wearing appropriate protective equipment and handling the acid carefully. It is also recommended to perform dilutions in a well-ventilated area or under a fume hood.