I have asked this question before but I was not clear enough. I want to prepare a 37% w/w solution (in water)of sulfuric acid from 96% sulfuric acid. I need around 500ml, I know it won't be exactly that, I want to know how to use the conversion using density, I've been shown a way I think is incorrect and need some input. I cannot weigh the chemical I need to have a conversion equation.
If you do not have the means to weigh the chemical, and if an approximate concentration is needed, than use the approximate value of density=1.840 g/mL to estimate the weight from given volumes. If you need a modified version without weighing, please let us know.
It is ironic that you need w/w concentration but do not have access to mass determination. I hope you do have access to volume measurements!
Here it is:
H2SO4:
500 g 35% w/w H2SO4 contains
500*0.37 g pure H2SO4, or
500*0.37/0.96 g of 96% (w/w) H2SO4
=192.71 g of 96% H2SO4
=192.71/1.840 mL of 96% H2SO4
=104.73 mL. of 96% H2SO4
H2O:
Volume of diluting water
= 500-192.71 g
=307.29 g
= 307.29 mL.
Summary:
use
104.73 mL 96% (w/w) H2SO4
307.29 mL H2O
to make 500 g of 37%(w/w) H2SO4
(all approximate)
To prepare a 37% w/w solution of sulfuric acid from 96% sulfuric acid, you can use a conversion equation based on density. Here's a step-by-step explanation of how to do it:
1. Start by determining the mass of the concentrated sulfuric acid needed to prepare the desired solution. We know that we need around 500 ml of the solution, but since the density of the sulfuric acid solution is not provided, we can't directly calculate the mass. Therefore, we'll use a conversion equation.
2. The formula for calculating the mass of a substance is:
Mass = Volume x Density
Rearrange the equation to solve for the volume:
Volume = Mass / Density
3. The density of the 96% sulfuric acid solution can vary, but for this example, let's assume it is 1.84 g/ml.
4. To calculate the volume of the concentrated sulfuric acid needed, plug in the values into the equation:
Volume = Mass / Density
Volume = (0.37 * 500 ml) / 1.84 g/ml
5. Calculate the volume of the concentrated sulfuric acid:
Volume = 135.87 ml (approximately)
6. This means you need approximately 135.87 ml of the 96% sulfuric acid to prepare the 37% w/w solution of sulfuric acid.
Remember that these calculations are based on the assumption of a density value of 1.84 g/ml. If you have the specific density value for your particular sulfuric acid solution, you can use that instead for a more accurate result.