Calculate the concentration in ppm if 8 grams of CaCl2 is dissolved in 250 ml of water.
1 mg/L = 1 ppm
You have 8 g/250 mL = 8000 mg/250 = 8000 x (1000/250) = ??
1 ppm is supposed to be 1 g solute in 1,000,000 g total. In small concns it is ok to ignore the mass of the solute in calculating the final mass of the solution but 8 g/250 mL is hardly small. With no density this is about the best I can do.
To calculate the concentration in parts per million (ppm), you need to know the amount of solute (in grams) and the volume of the solution (in milliliters). The formula to calculate ppm is as follows:
ppm = (mass of solute / volume of solution) * 10^6
In this case, you have 8 grams of CaCl2 dissolved in 250 ml of water.
First, convert the volume from milliliters to liters by dividing it by 1000:
Volume of solution = 250 ml / 1000 = 0.25 L
Now, substitute the given values into the formula:
ppm = (8 g / 0.25 L) * 10^6
Simplify the equation:
ppm = 32000 * 10^6
Therefore, the concentration of CaCl2 in ppm is 32,000,000 ppm.