Find the percentage of oxyge in
Washing soda
Answers
Hlo mate here is ur ans......
Molecular Weight of Na2CO3=106.
Molecular Weight of Na2CO3=106.The Molecule contains 1 oxygen atom. It's Atomic Weight is=16. So Mass percentage of oxygen in sodium carbonate is.
Molecular Weight of Na2CO3=106.The Molecule contains 1 oxygen atom. It's Atomic Weight is=16. So Mass percentage of oxygen in sodium carbonate is.=16 x3/106 x 100= 45.28 %....
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Answer:
Washing soda is Na2CO3. You calculate the molecular weight of the carbonate by summating the atomic masses of each element adjusted for the number of atoms of each element present. The elemental oxygen percentage in sodium carbonate is thus 3x16 x100/106
I have assumed that your washing soda is anhydrous which it probably is not, in which case, you calculate the molecular weight of the hydrated salt, Na2CO3 10H20 which is 286g/mol.
Your question relates to the elemental oxygen content which requires you to include the oxygen in the 10 molecules of water of crystallisation. Thus, the oxygen % is:
(3x16 + 10 x 16) x 100/286
Just so that you can claim an input to your homework question, I’ll leave you to evaluate the quantities for the anhydrous and hydrated salts