From your mass of MgNH4PO4.6H2O collected, calculate your value
a) for the mass of "P2O5" in the initial mass of fertilizer analyzed
b) the % "P2O5" in the fertilizer. Compare this with the manufacturer's specification.
Just want to know how i would go about this question, where would I start.
mass P2O5 = mass MgNH4PO4.6H2O x (molar mass P2O5/2*molar mass MgNH4PO4) = ?
%P2O5 = (mass P2O5)/mass sample)*100 = ?
Well, let's start by breaking down the question. We have a mass of MgNH4PO4.6H2O, and we need to calculate the value for the mass of "P2O5" in the initial mass of fertilizer analyzed, as well as the percentage of "P2O5" in the fertilizer.
To calculate the mass of "P2O5," we need to convert the mass of MgNH4PO4.6H2O to moles and then use the stoichiometry of the compound to determine the mole ratio between "P2O5" and MgNH4PO4.6H2O. From there, we can convert back to mass.
To calculate the percentage of "P2O5" in the fertilizer, we will compare the mass of "P2O5" to the mass of the entire fertilizer and then multiply by 100 to get a percentage. We will then compare this with the manufacturer's specification.
So, let's get started by finding the molar mass of MgNH4PO4.6H2O and "P2O5."
To calculate the mass of "P2O5" in the initial mass of fertilizer, you need to follow these steps:
Step 1: Determine the molar mass of "P2O5."
The molar mass of "P2O5" can be calculated by adding up the atomic masses of the constituent elements. In this case, phosphorus (P) has a molar mass of 31.0 g/mol, and oxygen (O) has a molar mass of 16.0 g/mol. Therefore, the molar mass of "P2O5" is 2(31.0) + 5(16.0) = 142.0 g/mol.
Step 2: Convert the mass of MgNH4PO4.6H2O to moles.
Using the molar mass of the hydrated compound MgNH4PO4.6H2O, you can convert the mass of the compound to moles. This can be done by dividing the given mass by the molar mass of the compound.
Step 3: Calculate the moles of "P2O5."
Based on the balanced chemical equation of the reaction, every mole of MgNH4PO4.6H2O produces one mole of "P2O5." Therefore, the number of moles of "P2O5" is the same as the moles of MgNH4PO4.6H2O.
Step 4: Convert moles of "P2O5" to grams.
Multiply the moles of "P2O5" by the molar mass determined in Step 1 to find the mass of "P2O5" in grams.
For the % "P2O5" in the fertilizer, you can use the following formula:
% "P2O5" = (mass of "P2O5" / initial mass of fertilizer) x 100.
Compare this percentage with the manufacturer's specification to determine whether it meets their stated value.
By following these steps, you should be able to calculate the mass of "P2O5" in the initial mass of fertilizer and the percentage "P2O5" in the fertilizer.
To solve this question, you need to follow these steps:
Step 1: Determine the molar mass of the compound
The compound in question is MgNH4PO4.6H2O. To calculate its molar mass, you need to multiply the number of atoms in each element by their respective atomic masses and add them up. Here are the atomic masses of the elements involved in this compound:
- Magnesium (Mg) = 24.31 g/mol
- Nitrogen (N) = 14.01 g/mol
- Hydrogen (H) = 1.01 g/mol
- Phosphorus (P) = 30.97 g/mol
- Oxygen (O) = 16.00 g/mol
Multiply the number of atoms of each element by their atomic masses and sum them up to get the molar mass of MgNH4PO4.6H2O.
Step 2: Convert mass of MgNH4PO4.6H2O to moles
You mentioned that you have a mass of MgNH4PO4.6H2O collected. Convert this mass to moles using the molar mass calculated in step 1. Divide the given mass by the molar mass to get the number of moles.
Step 3: Calculate the moles of P2O5
In MgNH4PO4.6H2O, the ratio of moles of P2O5 to moles of MgNH4PO4.6H2O is 1:1. So, the number of moles of P2O5 is the same as the number of moles of MgNH4PO4.6H2O calculated in step 2.
Step 4: Calculate the mass of P2O5
To calculate the mass of P2O5, multiply the number of moles of P2O5 by its molar mass. The molar mass of P2O5 is 141.94 g/mol.
Step 5: Calculate the percentage of P2O5 in the fertilizer
To calculate the percentage of P2O5 in the fertilizer, divide the mass of P2O5 (calculated in step 4) by the initial mass of the fertilizer sample (given in the question) and multiply by 100.
Step 6: Compare with the manufacturer's specification
Compare the percentage of P2O5 calculated in step 5 with the manufacturer's specification to see if they match.
Following these steps, you should be able to calculate the value for the mass of P2O5 in the initial mass of fertilizer analyzed, and also determine the percentage of P2O5 in the fertilizer and compare it with the manufacturer's specification.