Molar Mass of Calcium Sulfate (CaSO4)
Molar Mass of Calcium Sulfate is commonly used in ionic-equation practice and concentration calculations for salt solutions. Molar Mass of CaSO₄ is 136.13 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 calculations.
Molar Mass of Calcium Sulfate is:
136.13 g/mol
Molar Mass of CaSO₄ equals 136.13 g/mol, so 136.13 grams is one mole.
Element Breakdown Table
| Element | Count | Atomic mass | Calculation | Contribution |
|---|---|---|---|---|
| Calcium (Ca) | 1 | 40.08 | 1 x 40.08 | 40.08 g/mol |
| Sulfur (S) | 1 | 32.06 | 1 x 32.06 | 32.06 g/mol |
| Oxygen (O) | 4 | 16.00 | 4 x 16.00 | 64.00 g/mol |
Final molar mass 40.080 + 32.060 + 64.000 | 136.13 g/mol | |||
Computing Molar Mass of Calcium Sulfate Step by Step
Molar Mass of Calcium Sulfate: Step-by-Step Calculation
1. Identify Element Counts
Read CaSO4 and list how many atoms of each element are present:
- 1 atom of Calcium (Ca)
- 1 atom of Sulfur (S)
- 4 atoms of Oxygen (O)
2. Determine Atomic Masses
Look up each element mass from the periodic table:
- Calcium (Ca) ~= 40.078 g/mol
- Sulfur (S) ~= 32.060 g/mol
- Oxygen (O) ~= 15.999 g/mol
3. Multiply Atomic Mass by Quantity
Multiply atom count by atomic mass for each element:
- Calcium (Ca): 1 x 40.078 = 40.080 g/mol
- Sulfur (S): 1 x 32.060 = 32.060 g/mol
- Oxygen (O): 4 x 15.999 = 64.000 g/mol
4. Sum Total Molar Mass
Add all contributions to get the final molar mass in g/mol.
Molar Mass = (1 x 40.078 + 1 x 32.060 + 4 x 15.999)
Molar Mass = 40.080 + 32.060 + 64.000
Molar Mass = 136.130 g/mol
Final rounded value shown on this page: 136.13 g/mol.
Visual Calculation Chart
| Element | Count | Mass | Count x mass | Contribution |
|---|---|---|---|---|
| Calcium (Ca) | 1 | 40.078 | 1 x 40.078 | = 40.080 |
| Sulfur (S) | 1 | 32.060 | 1 x 32.060 | = 32.060 |
| Oxygen (O) | 4 | 15.999 | 4 x 15.999 | = 64.000 |
Final molar mass 40.080 + 32.060 + 64.000 | = 136.130 | |||
Easy Way to Remember
Easy way to remember Molar Mass of Calcium Sulfate
- Molar Mass of Calcium Sulfate: 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 |
Do You Know?
– Calcium Sulfate contains 3 element types: Ca, S, O.
– O contributes the largest share of this compound's total molar mass.
– In CaSO₄, O appears with the highest atom count.
– Its molar mass is 136.13 g/mol, which is used directly in gram-to-mole conversions.
– A common reaction for Calcium Sulfate is double displacement (AgNO₃ + NaCl → AgCl + NaNO₃).
Why This Compound Matters
Calcium Sulfate 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 Calcium Hydrogen Sulfate (Ca(HSO4)2) and Calcium Sulfite (CaSO3).
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 CaSO₄ and miscounting atoms.
- Rounding atomic masses too early before finishing all multiplication steps.
- Mixing up O element contribution with total molar mass.
- Reporting a value without units; final answer should be in g/mol for Calcium Sulfate.
Quick Revision
Formula: CaSO4
Molar Mass: 136.13 g/mol
Key takeaway: count atoms accurately, multiply by atomic masses, and sum only at the end.
Formula Explanation
CaSO4 contains Calcium (Ca) (1), Sulfur (S) (1), Oxygen (O) (4). Add each element contribution to get total molar mass.
Keep molar mass guide open while practicing so your totals match the same method shown here.
FAQ
Conclusion
Molar Mass of Calcium Sulfate and Molar Mass of CaSO₄ are now easy to revise with this structured page. You can use this method in exams, lab reports, and daily chemistry practice.