Molar Mass of Magnesium Phosphate (Mg3(PO4)2)
Molar Mass of Magnesium Phosphate is a key number in salt-related stoichiometry, especially when balancing reactants and products. Molar Mass of Mg₃(PO₄)₂ is 262.86 g/mol, based on 3 element types, with O contributing the largest share.
For fast checks, use the calculate molar mass, verify element values in the periodic table with molar mass, or explore more molar mass.
Molar Mass of Magnesium Phosphate is:
262.86 g/mol
Molar Mass of Mg₃(PO₄)₂ equals 262.86 g/mol, so 262.86 grams is one mole.
Element Breakdown Table
| Element | Count | Atomic mass | Calculation | Contribution |
|---|---|---|---|---|
| Magnesium (Mg) | 3 | 24.30 | 3 x 24.30 | 72.91 g/mol |
| Phosphorus (P) | 2 | 30.97 | 2 x 30.97 | 61.95 g/mol |
| Oxygen (O) | 8 | 16.00 | 8 x 16.00 | 127.99 g/mol |
Final molar mass 72.910 + 61.950 + 127.990 | 262.86 g/mol | |||
Computing Molar Mass of Magnesium Phosphate Step by Step
Molar Mass of Magnesium Phosphate: Step-by-Step Calculation
1. Identify Element Counts
Read Mg3(PO4)2 and list how many atoms of each element are present:
- 3 atoms of Magnesium (Mg)
- 2 atoms of Phosphorus (P)
- 8 atoms of Oxygen (O)
2. Determine Atomic Masses
Look up each element mass from the periodic table:
- Magnesium (Mg) ~= 24.305 g/mol
- Phosphorus (P) ~= 30.974 g/mol
- Oxygen (O) ~= 15.999 g/mol
3. Multiply Atomic Mass by Quantity
Multiply atom count by atomic mass for each element:
- Magnesium (Mg): 3 x 24.305 = 72.910 g/mol
- Phosphorus (P): 2 x 30.974 = 61.950 g/mol
- Oxygen (O): 8 x 15.999 = 127.990 g/mol
4. Sum Total Molar Mass
Add all contributions to get the final molar mass in g/mol.
Molar Mass = (3 x 24.305 + 2 x 30.974 + 8 x 15.999)
Molar Mass = 72.910 + 61.950 + 127.990
Molar Mass = 262.860 g/mol
Final rounded value shown on this page: 262.86 g/mol.
Visual Calculation Chart
| Element | Count | Mass | Count x mass | Contribution |
|---|---|---|---|---|
| Magnesium (Mg) | 3 | 24.305 | 3 x 24.305 | = 72.910 |
| Phosphorus (P) | 2 | 30.974 | 2 x 30.974 | = 61.950 |
| Oxygen (O) | 8 | 15.999 | 8 x 15.999 | = 127.990 |
Final molar mass 72.910 + 61.950 + 127.990 | = 262.860 | |||
Easy Way to Remember
Easy way to remember Molar Mass of Magnesium Phosphate
- Molar Mass of Magnesium Phosphate: count atoms, multiply masses, and add totals.
- Write each element in a table so you do not miss subscripts.
- Keep 2-3 decimals during steps, then round only at the end.
Sample Reactions
| Type | Reaction |
|---|---|
| Double displacement | AgNO₃ + NaCl → AgCl + NaNO₃ |
| Acid-salt reaction | Na₂CO₃ + ₂HCl → ₂NaCl + H₂O + CO₂ |
Use these reactions with molar mass guide when you need the molar mass for each species.
Do You Know?
– Magnesium Phosphate contains 3 element types: Mg, P, O.
– O contributes the largest share of this compound's total molar mass.
– In Mg₃(PO₄)₂, O appears with the highest atom count.
– Its molar mass is 262.86 g/mol, which is used directly in gram-to-mole conversions.
– A common reaction for Magnesium Phosphate is double displacement (AgNO₃ + NaCl → AgCl + NaNO₃).
Why This Compound Matters
Magnesium Phosphate appears in ionic-reaction practice and precipitation examples in school chemistry.
Its molar mass helps students move quickly between grams, moles, and concentration problems.
Similar calculations can be compared with Sodium Phosphate (Na3PO4) and Potassium Phosphate (K3PO4).
Where This Is Used
- Competitive exams and school chemistry tests.
- Lab work when preparing measured solutions.
- Real-world manufacturing and quality checks.
Common Mistakes When Calculating This
- Skipping subscripts in Mg₃(PO₄)₂ and miscounting atoms.
- Forgetting that parentheses in Mg₃(PO₄)₂ multiply the entire grouped part.
- Mixing up O element contribution with total molar mass.
- Reporting a value without units; final answer should be in g/mol for Magnesium Phosphate.
Quick Revision
Formula: Mg3(PO4)2
Molar Mass: 262.86 g/mol
Key takeaway: count atoms accurately, multiply by atomic masses, and sum only at the end.
Formula Explanation
Mg3(PO4)2 contains Magnesium (Mg) (3), Phosphorus (P) (2), Oxygen (O) (8). Add each element contribution to get total molar mass.
FAQ
Conclusion
Molar Mass of Magnesium Phosphate and Molar Mass of Mg₃(PO₄)₂ are now easy to revise with this structured page. You can use this method in exams, lab reports, and daily chemistry practice.