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Ivanshal [37]
3 years ago
11

Hydrazine, N2H4, is a weak base and is used as fuel in the space shuttle.

Chemistry
1 answer:
FrozenT [24]3 years ago
3 0

Answer:

Kb = 1.6*10^-6

Explanation:

The given reaction is:

N2H4(aq)+H2O(l)\rightarrow N2H5+(aq)+OH-(aq)

The ionization constant of the base Kb is given as:

Kb = \frac{[N2H5+][OH-]}{[N2H4]}------(1)

The pH = 10.66

therefore, pOH = 14-pH = 14-10.66 =3.34

[OH-] = 10^{-pOH} =10^{-3.34} =4.57*10^{-4} M

[N2H5+] = [OH-] = 4.57*10^-4M

[N2H4] = 0.133 M

Based on eq(1)

Kb = \frac{[4.57*10^{-4}]^{2}}{[0.133]}=1.6*10^{-6}

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