if 〖HNO〗_3 changes into N_2 O,then calculate the change in oxidation number.
To calculate the change in oxidation number when 〖HNO〗_3 changes into N_2 O, you need to determine the oxidation numbers of the elements in each compound and then compare them.
Let's start by assigning oxidation numbers to each element in 〖HNO〗_3 and N_2 O:
In 〖HNO〗_3 (nitric acid), hydrogen (H) usually has +1 oxidation number, oxygen (O) usually has -2 oxidation number, and the sum of oxidation numbers in the molecule should be zero because it is a neutral compound.
So, let's solve for the oxidation number of nitrogen (N) in 〖HNO〗_3:
(+1) + N + (-2) * 3 = 0
+1 + N - 6 = 0
N - 5 = 0
N = +5
Therefore, the oxidation number of nitrogen (N) in 〖HNO〗_3 is +5.
Now, let's assign oxidation numbers to each element in N_2 O (nitrous oxide):
In N_2 O, oxygen (O) usually has -2 oxidation number, and the sum of oxidation numbers in the molecule should be zero because it is a neutral compound.
Let's solve for the oxidation number of nitrogen (N) in N_2 O:
N * 2 + (-2) = 0
2N - 2 = 0
2N = 2
N = +1
Therefore, the oxidation number of nitrogen (N) in N_2 O is +1.
To calculate the change in oxidation number, subtract the initial oxidation number from the final oxidation number:
Change in oxidation number = Final oxidation number - Initial oxidation number
Change in oxidation number = (+1) - (+5)
Change in oxidation number = -4
The change in oxidation number from 〖HNO〗_3 to N_2 O is -4.