<span>When M(OH)2 dissolves we have
M(OH)2 which produces M2+ and 2OHâ’
pH + pOH=14
At ph =7; we have
7+pOH=14
pOH=14â’7 = 7
Then [OHâ’]=10^(â’pOH)
[OH-] = 10^(-7) = 1* 10^(-7)
At ph = 10. We have,
pOH = 4. And [OH-] = 10^(-4) = 1 * 10^(-4)
Finally ph = 14. We have, pOH = 0
And then [OH-] = 10^(-0) -----anything raised to zero power is 1, but (-0)...
So [OH-] = 1</span>
It will take 497.67 years to decay.
What is half-life ?
The duration needed for a quantity to decrease to half of its initial value is known as the half-life. In nuclear physics, the phrase is frequently used to indicate how rapidly unstable atoms decay radioactively or how long stable atoms last. The phrase is also used more broadly to describe any kind of exponential decay (or, very infrequently, nonexponential decay). The biological half-life of medications and other compounds in the human body, for instance, is a term used in the medical sciences. Half-opposite life's in exponential growth is time's doubling.
The formula
At = (Ao)(0.5)(t/h)
where Ao is the initial amount determines the amount of material at a specific time t, At, with a half-life of h.
At/Ao = 0.45 from the stated results in (0.5)(t/432).
T in the equation has a value of 497.67 years.
To learn more about half-life click on the link below:
brainly.com/question/19500804
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Answer:
A base is a substance that can donate a hydroxide ion.
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