Hydrogen peroxide (h2o2) decomposes according to the equation:h2o2(l) ⇆ h2o(l) + ½ o2(g)calculate kp for t
his reaction at 25°c. (δh° = –98.2 kj/mol, δs° = 70.1 j/k·mol)
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[H_{3}O^{+}] = 0.00770 M
The equilibrium equation representing the dissociation of
Given [H_{3}O^{+}] = 0.00770 M
Let the initial concentration of acid be x and change y
So y = =
= 0.00770 M
0.00257 x - 0.00001979 = 0.00005929
x = 0.031 M
Therefore, initial concentration of the weak acid is <u>0.031 M</u>