jayjeralm070805
05.10.2019 •
Chemistry
The ka of an acid is 1.3 mc020-1.jpg 10–7. based on the ka and its relationship with kw, what is the value of kb?
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Ответ:
Ka is the constant of dissociation of the acid.
Kb is the constant of dissociation of the conjugated base
The relationship between Ka and Kb is:
Ka * Kb = Kw = 1 * 10 ^-`14
=> Kb = Kw / Ka
=> Kb = [1 * 10 ^ -14 ] / [1.3 * 10 ^ -7] = 7.69 * 10 ^-8 = 7.7 * 10 ^ -8
7.7 * 10^-8
Ответ:
This means that the isotope of silicon with a mass number of 28 is by far the most common of these three isotopes.
Explanation:
The abundance of Si-28 is 92.23%. Si-29 is 4.68% and Si-30 is 3.09%.