Molar Mass of Ammonium Thiosulfate ((NH4)2S2O3)
Molar Mass of Ammonium Thiosulfate is a key number in salt-related stoichiometry, especially when balancing reactants and products. Molar Mass of (NH₄)₂S₂O₃ is 148.19 g/mol, based on 4 element types, with S contributing the largest share.
For fast checks, use the molar mass calculator, verify element values in the periodic table, or explore more molar mass page.
Molar Mass of Ammonium Thiosulfate is:
148.19 g/mol
Molar Mass of (NH₄)₂S₂O₃ equals 148.19 g/mol, so 148.19 grams is one mole.
Element Breakdown Table
| Element | Count | Atomic mass | Calculation | Contribution |
|---|---|---|---|---|
| Nitrogen (N) | 2 | 14.01 | 2 x 14.01 | 28.01 g/mol |
| Hydrogen (H) | 8 | 1.01 | 8 x 1.01 | 8.06 g/mol |
| Sulfur (S) | 2 | 32.06 | 2 x 32.06 | 64.12 g/mol |
| Oxygen (O) | 3 | 16.00 | 3 x 16.00 | 48.00 g/mol |
Final molar mass 28.010 + 8.060 + 64.120 + 48.000 | 148.19 g/mol | |||
Computing Molar Mass of Ammonium Thiosulfate Step by Step
Molar Mass of Ammonium Thiosulfate: Step-by-Step Calculation
1. Identify Element Counts
Read (NH4)2S2O3 and list how many atoms of each element are present:
- 2 atoms of Nitrogen (N)
- 8 atoms of Hydrogen (H)
- 2 atoms of Sulfur (S)
- 3 atoms of Oxygen (O)
2. Determine Atomic Masses
Look up each element mass from the periodic table:
- Nitrogen (N) ~= 14.007 g/mol
- Hydrogen (H) ~= 1.008 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:
- Nitrogen (N): 2 x 14.007 = 28.010 g/mol
- Hydrogen (H): 8 x 1.008 = 8.060 g/mol
- Sulfur (S): 2 x 32.060 = 64.120 g/mol
- Oxygen (O): 3 x 15.999 = 48.000 g/mol
4. Sum Total Molar Mass
Add all contributions to get the final molar mass in g/mol.
Molar Mass = (2 x 14.007 + 8 x 1.008 + 2 x 32.060 + 3 x 15.999)
Molar Mass = 28.010 + 8.060 + 64.120 + 48.000
Molar Mass = 148.190 g/mol
Final rounded value shown on this page: 148.19 g/mol.
Visual Calculation Chart
| Element | Count | Mass | Count x mass | Contribution |
|---|---|---|---|---|
| Nitrogen (N) | 2 | 14.007 | 2 x 14.007 | = 28.010 |
| Hydrogen (H) | 8 | 1.008 | 8 x 1.008 | = 8.060 |
| Sulfur (S) | 2 | 32.060 | 2 x 32.060 | = 64.120 |
| Oxygen (O) | 3 | 15.999 | 3 x 15.999 | = 48.000 |
Final molar mass 28.010 + 8.060 + 64.120 + 48.000 | = 148.190 | |||
Easy Way to Remember
Easy way to remember Molar Mass of Ammonium Thiosulfate
- Molar Mass of Ammonium Thiosulfate: 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?
– Ammonium Thiosulfate contains 4 element types: N, H, S, O.
– S contributes the largest share of this compound's total molar mass.
– In (NH₄)₂S₂O₃, H appears with the highest atom count.
– Its molar mass is 148.19 g/mol, which is used directly in gram-to-mole conversions.
– A common reaction for Ammonium Thiosulfate is double displacement (AgNO₃ + NaCl → AgCl + NaNO₃).
Why This Compound Matters
Ammonium Thiosulfate 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 Ammonium Hydrogen Sulfate (NH4HSO4) and Ammonium Sulfate ((NH4)2SO4).
Where This Is Used
- Competitive exams and school chemistry tests.
- Lab work when preparing measured solutions.
- Real-world manufacturing and quality checks.
Whenever you need lab-ready totals in those settings, molar mass page stays handy for cross-checking.
Common Mistakes When Calculating This
- Skipping subscripts in (NH₄)₂S₂O₃ and miscounting atoms.
- Forgetting that parentheses in (NH₄)₂S₂O₃ multiply the entire grouped part.
- Mixing up S element contribution with total molar mass.
- Reporting a value without units; final answer should be in g/mol for Ammonium Thiosulfate.
Quick Revision
Formula: (NH4)2S2O3
Molar Mass: 148.19 g/mol
Key takeaway: count atoms accurately, multiply by atomic masses, and sum only at the end.
Formula Explanation
(NH4)2S2O3 contains Nitrogen (N) (2), Hydrogen (H) (8), Sulfur (S) (2), Oxygen (O) (3). Add each element contribution to get total molar mass.
FAQ
Conclusion
Molar Mass of Ammonium Thiosulfate and Molar Mass of (NH₄)₂S₂O₃ are now easy to revise with this structured page. You can use this method in exams, lab reports, and daily chemistry practice.