The molarity of H3PO4 is .01 M. The density of the H3PO4 in the solution is .0009 g/mL. What is the mass percent of H3PO4 in the solution, which has a density of 1.11 g/ml?
0.01M means 0.01 mols H3PO4/1000 mL solution. The molar mass is 98; therefore, there are 0.98 grams H3PO4/1000 mL solution.
mass solution is 1000 mL x 1.11 g/mL = 1110 grams.
mass % = (gH3PO4/g solution) = (0.98/1110)*100 = ? % w/w
To find the mass percent of H3PO4 in the solution, we need to calculate the mass of H3PO4 and the total mass of the solution.
First, let's calculate the mass of H3PO4 in the solution.
Given:
Molarity of H3PO4 = 0.01 M
Density of the H3PO4 solution = 0.0009 g/mL
To find the mass of H3PO4, we can use the molarity and density.
1. Calculate the volume of the solution:
Molarity (M) = moles of solute / volume of solution (in liters)
Rearranging the formula, we can find the volume of the solution:
Volume of solution (in liters) = moles of solute / Molarity
Since the molarity is 0.01 M, and we know that one mole of H3PO4 has a mass of 98 g/mol, we can calculate the moles of H3PO4:
Moles of H3PO4 = Molarity x Volume of solution (in liters)
= 0.01 mol/L x Volume of solution (in liters)
2. Calculate the volume of the solution:
The density is given as 0.0009 g/mL. To calculate the volume of the solution, we can use the formula:
Volume of solution (in mL) = mass of solution (in g) / density of solution (in g/mL)
Rearranging the formula, we can find the mass of the solution:
Mass of solution (in g) = Volume of solution (in mL) x density of solution (in g/mL)
Now, we can substitute the known values to calculate the mass of the solution:
Mass of solution (in g) = Volume of solution (in mL) x density of solution (in g/mL)
Lastly, we can calculate the mass percent by using the formula:
Mass percent = (mass of H3PO4 / mass of solution) x 100
Let's calculate the mass percent of H3PO4 in the solution.
First, calculate the volume of the solution:
Volume of solution = moles of H3PO4 / Molarity
Next, calculate the mass of the solution:
Mass of solution = Volume of solution x density of solution
Finally, calculate the mass percent of H3PO4:
Mass percent = (Mass of H3PO4 / Mass of solution) x 100