The dissociation constant of the base : 7.4 x 10⁻⁴
<h3>Further explanation</h3>
Butylamine, C4H9NH2 Is A Weak Base
Kb is the dissociation constant of the base.
LOH (aq) ---> L⁺ (aq) + OH⁻ (aq)
![\rm Kb=\dfrac{[L][OH^-]}{[LOH]}](https://tex.z-dn.net/?f=%5Crm%20Kb%3D%5Cdfrac%7B%5BL%5D%5BOH%5E-%5D%7D%7B%5BLOH%5D%7D)
[OH⁻] for weak base can be formulated :
![\tt [OH^-]=\sqrt{Kb.M}](https://tex.z-dn.net/?f=%5Ctt%20%5BOH%5E-%5D%3D%5Csqrt%7BKb.M%7D)
pH of solution : 12
pH+pOH=14, so pOH :
14-12 = 2, then :
![\tt [OH^-]=10^{-pOH}\\\\(OH^-]=10^{-2}](https://tex.z-dn.net/?f=%5Ctt%20%5BOH%5E-%5D%3D10%5E%7B-pOH%7D%5C%5C%5C%5C%28OH%5E-%5D%3D10%5E%7B-2%7D)
the the dissociation constant (Kb) =
Or you can use from ICE method :
C4H9NH2(aq) + H2O(l) ⇌ C4H9NH3+(aq) + OH-(aq)
0.15
x x x
0.15-x x x
![\tt Kb=\dfrac{x^2}{0.15-x}\rightarrow x=[OH^-]\\\\Kb=\dfrac{10^{-4}}{0.15-10^{-2}}=7.14\times 10^{-4}](https://tex.z-dn.net/?f=%5Ctt%20Kb%3D%5Cdfrac%7Bx%5E2%7D%7B0.15-x%7D%5Crightarrow%20x%3D%5BOH%5E-%5D%5C%5C%5C%5CKb%3D%5Cdfrac%7B10%5E%7B-4%7D%7D%7B0.15-10%5E%7B-2%7D%7D%3D7.14%5Ctimes%2010%5E%7B-4%7D)
I could only find 7!
- independent variable
- dependent variable
- control group
- experimental group
- constant
- observation
- inference
Answer:
cesium
Explanation:
The most reactive metal on the periodic table is francium. However, francium is a man-made element and only minute quantities have been produced, so for all practical purposes, the most reactive metal is cesium. Cesium reacts explosively with water, though it is predicted francium would react even more vigorously.
Answer:
going down the periodic table atomic size increases,electronegativity and ionization decreases going down
