What discovery led J.J. Thomson to decide that atoms were not indivisible, but are actually composed of smaller parts?
1 answer:
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Answer :
The steps involved in the electron dot structure of are :
First we have to determine the total number of valence electron in .
Number of valence electrons in N = 5
The charge on N is (-3). So, we add 3 electrons.
Total number of valence electrons = 5 + 3 = 8 electrons
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The given question is incomplete. The complete question is as follows.
Sodium sulfate is slowly added to a solution containing 0.0500 M and 0.0390 M
. What will be the concentration of
(aq) when
begins to precipitate? What percentage of the
can be separated from the Ag(aq) by selective precipitation?
Explanation:
The given reaction is as follows.
= 0.0390 M
When precipitates then expression for
will be as follows.
= 0.00788 M
Now, equation for dissociation of calcium sulfate is as follows.
= 0.00625 M
Now, we will calculate the percentage of remaining in the solution as follows.
= 12.5%
And, the percentage of that can be separated is as follows.
100 - 12.5
= 87.5%
Thus, we can conclude that 87.5% will be the concentration of when
begins to precipitate.