Are you sure seems high to me?skyshrimp said:
That's was my first thought, butgleem said:
so 300x of a liter's worth.skyshrimp said:
skyshrimp said:
Wait, you've gone from a 300 liter fish tank to a can of soda? I'm getting dizzy...skyshrimp said:
45% phosphoric acid (H3PO4) means that 45% of the solution's weight is H3PO4. To find the concentration in terms of PO4, you need to consider the molecular weight of H3PO4 (98 g/mol) and PO4 (95 g/mol). Therefore, 45% H3PO4 translates to approximately 43.67% PO4 by weight.
First, determine the weight of PO4 in 1 gram of 45% phosphoric acid. Since 45% H3PO4 contains 43.67% PO4, 1 gram of 45% H3PO4 contains 0.4367 grams of PO4. For 1 liter of water, you need to calculate how much of this solution is required to achieve 1 ppm (1 mg/L) of PO4.
The formula to use is: Volume (mL) = (Desired concentration (mg/L) * Volume of water (L)) / (Concentration of PO4 in 45% H3PO4 (mg/mL)). For 1 ppm PO4 in 1 liter of water, the calculation would be: Volume (mL) = (1 mg/L * 1 L) / (0.4367 g/mL * 1000 mg/g) = 2.29 mL.
To raise the PO4 concentration by 1 ppm in 1 liter of water, you need approximately 2.29 mL of 45% phosphoric acid. This calculation ensures that the desired concentration is achieved accurately.
Yes, 45% phosphoric acid is a strong acid and can cause skin and eye irritation. Always wear appropriate personal protective equipment such as gloves, goggles, and lab coats when handling it. Work in a well-ventilated area and follow all safety guidelines for handling corrosive substances.