What is the molarity of a solution containing 17.0g of nh3 in 2.0 L of solution?
1 answer:
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Correct answer is .
Phosphoric acid is a polyprotic acid having 3 acidic hyrdogen therefore it will have 3 pka values.
The equations for the release of acidic hydrogen can be written as:
From the pka values we can judge the idea of pH as using Henderson-Hasselbalch Equation, we get the relation between pH and pka.
Using the following equation, relation of pH and pka is
Using this equation, we can find that the equation having pka= 2. 14 is closest to the pH=3.2 so the ionic form in this equation will be dominant at the same pH.
Therefore at pH=3.2 the ionic form of
is dominant.
Answer:
Group 14
Explanation:
The elements of the Periodic Table are arranged into 18 Groups.
Among the "main group elements" — those in Groups 1, 2 and 13 to 18 — the number of valence electrons — the number of electrons in the outermost energy level — corresponds to the last digit of the Group number.
Thus, Group 14 contains the elements with four valence electrons — C, Si, Ge, Sn, Pb, and Fl.
