Q.
Balance the equation:
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a
b
c
d
answer is B.
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Detailed Solution
A chemical reaction must have an equal quantity of each element on the reactant side and product side in order for it to be balanced. A chemical equation must be balanced in order to guarantee the application of the law of conservation of matter.
The number of components on the left-hand side (lhs) must match the number of elements on the right-hand side in order for a particular response to be balanced (rhs).
Think about the following chemical equation:
Consider the number of moles of each element on both reactant and product side:
On the LHS (no of moles of each element):
H−3
N−1
Ca−1
O−5
On the RHS (no of moles of each element):
H−2
N−2
Ca−1
O−7
We must balance it since the number of oxygen, hydrogen, and nitrogen moles on the LHS and RHS are not equal.
Let's first create the HNO3-2 coefficient by balancing the number of nitrogen moles. The equation will then be:
On the LHS (no of moles of each element):
H−4
N−2
Ca−1
O−8
On the RHS (no of moles of each element):
H−2
N−2
Ca−1
O−7
Now let’s balance the number of moles of H on the LHS and RHS.
Make the H2O−2 coefficient to bring their numbers into balance. The equation will then be:
On the LHS (no of moles of each element):
On the LHS (no of moles of each element):
H−4
N−2
Ca−1
O−8
On the RHS (no of moles of each element):
H−4
N−2
Ca−1
O−8
Now the number of moles of each element on both sides has been equal and we got the balance chemical equation as:
Hence, option B is correct.