2NaClO3 ---> 2NaCl + 3O2
Which of the following statements are correct ?
1. The oxidation number of oxygen increases
2. The oxidation number of sodium increases
3. The oxidation number of chlorine decreases
A. 1 and 2 only
B. 1 and 3 only
C. 2 and 3 only
D. 1 , 2 and 3
oxidation no.
2012-01-14 9:50 pm
回答 (1)
2012-01-15 7:34 am
✔ 最佳答案
Reactants:O.N. of Na in NaClO3 = +1
O.N. of O in NaClO3 = -2
So +1 + O.N. of Cl in NaClO3 -2*3 = 0
O.N. of Cl in NaClO3 = +5
Products:
O.N. of Na in NaCl = +1
O.N. of Cl in NaCl = -1
O.N. of O in O2 = 0
So the O.N. of Na in overall reaction does not change.
The O.N. of O in overall reaction increases from -2 to 0.
The O.N. of Cl in overall reaction decreases from +5 to -1.
Hence, ans: B
參考: Knowledge is power.
收錄日期: 2021-04-23 18:38:36
原文連結 [永久失效]:
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