parts per million 280 grams of CaO is dissolved in enough water to make 10 L of solution
To calculate the concentration of CaO in this solution in parts per million (ppm), we need to first calculate the molarity of the solution and then convert it to ppm.
First, we need to calculate the number of moles of CaO in 280 grams:
280 grams / 56.08 g/mol (molar mass of CaO) = 5 moles of CaO
Next, we need to calculate the molarity of the solution:
Molarity = moles of solute / volume of solution in liters
Molarity = 5 moles / 10 L = 0.5 M
Finally, we convert the molarity to ppm:
1 ppm = 1 mg/L
0.5 M = 0.5 mol/L
0.5 mol/L x 56.08 g/mol (molar mass of CaO) x 1000 mg/g = 28,040 mg/L
So, the concentration of CaO in this solution is 28,040 ppm.