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Answer:
An aqueous solution of [tex]HNO_3[/tex] will be an acid and have a pH of less than 7.
An aqueous solution of [tex]NaCl[/tex] will be a neutral solution and have a pH equal to 7.
An aqueous solution of [tex]NaOH[/tex] will be an base and have a pH of more than 7.
Explanation:
pH is defined as the negative logarithm of the concentration of hydrogen ions.
Thus,
pH = - log [H⁺]
pH scale generally runs from 1 to 14 where pH = 7 represents neutral medium, pH < 7 represents acidic medium and pH > 7 represents basic medium.
Thus,
An aqueous solution of [tex]HNO_3[/tex] will be an acid and have a pH of less than 7.
An aqueous solution of [tex]NaCl[/tex] will be a neutral solution and have a pH equal to 7.
An aqueous solution of [tex]NaOH[/tex] will be an base and have a pH of more than 7.
HNO3 solution shows acidic nature, NaCl indicates neutral pH whereas the NaOH solution represents basic nature.
Reading on pH scale
The pH value for an aqueous solution of HNO3 is less than 7, for an aqueous solution of NaCl is 7 and for an aqueous solution of NaOH has more than 7 because solution of HNO3 has hydrogen which shows acidic nature whereas the NaOH solution has OH- ion which represents basic nature.
Neutral and basic pH
NaCl has no hydrogen atom nor -OH so it acts as a neutral substance having neutral pH. On the pH scale, lower than 7 indicates acid, more than 7 shows basic and 7 shows neutral pH so we can conclude that HNO3 solution shows acidic nature, NaCl indicates neutral pH whereas the NaOH solution represents basic nature.
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