Which of the following is the correct molecular shape of NH3?
А) bent
B) linear
C) tetrahedral
D) trigonal pyramidal
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Ответ:
Option D
A solution is said to be acidic if it gives hydrogen ions
in the aqueous solution. In pH meter, acids ranges from 0 to below 7, at 7 solution becomes neutral and above 7 it becomes basic.
An acid can not have a pH of 7 because it is for neutral solutions. An acid does not have hydroxide ions because this is base which gives hydroxide ions in the aqueous solution. A solution with any positive ion can not be acidic, it is acidic in the presence of hydrogen or hydronium ion only.
Thus, option D is correct: an acid has more hydrogen ions in the solution.