calculate the percentage of sulphur in sodium thiosulphate, Na2S2O2
40.50
To calculate the percentage of sulphur in sodium thiosulphate (Na2S2O2), we need to determine the molar mass of sulphur in the compound and divide it by the molar mass of the entire compound. Here are the steps to calculate the percentage of sulphur:
1. Determine the molar mass of sodium thiosulphate (Na2S2O2):
- Molar mass of Na (sodium) = 22.99 g/mol (atomic mass from the periodic table)
- Molar mass of S (sulphur) = 32.07 g/mol (atomic mass from the periodic table)
- Molar mass of O (oxygen) = 16.00 g/mol (atomic mass from the periodic table)
Calculating the molar mass:
2 * (Na) + 2 * (S) + 2 * (O) = (2 * 22.99 g/mol) + (2 * 32.07 g/mol) + (2 * 16.00 g/mol) = 158.11 g/mol
2. Determine the molar mass of sulphur in sodium thiosulphate:
Since there are 2 sulphur atoms in the compound, divide the molar mass of sulphur by 2.
(32.07 g/mol) / 2 = 16.035 g/mol
3. Calculate the percentage of sulphur in sodium thiosulphate:
Divide the molar mass of sulphur by the molar mass of the entire compound and multiply by 100 to get the percentage.
(16.035 g/mol / 158.11 g/mol) * 100 = 10.14%
Therefore, the percentage of sulphur in sodium thiosulphate is approximately 10.14%.
Ans)40.5
Why did the sulfur go to school? Because it wanted to get S-M-A-R-T!
Done by mass S in total mass of Na2S2O3.
mass S = 2*32
total mass is 2*Na + 2*S + 3*O
Then %S = (64/total mass Na2S2O3)*100 = ?