
The compound whose aqueous solution has highest pH is:
A. \[NaCl\]
B. $N{H_4}Cl$
C. $C{H_3}COONH{}_4$
D. $N{a_2}C{O_3}$
Answer
510k+ views
Hint: The strength of pH of any salt is judged by checking whether the substance is a salt of strong acid and strong base or weak acid and weak base. The other two possibilities for a salt are strong acid and weak base or weak acid and strong base.
Complete step by step answer:
If we want to check the pH strength of any salt without going deep into its practical details, we can simply take the salt and put it into water. As soon as the salt is dropped in the water, it starts dissociating to form corresponding ions. In the case of the above mentioned salts, the ions formed will be:
$
NaCl \to N{a^ + } + C{l^ - } \\
N{H_4}Cl \to NH_4^ + + C{l^ - } \\
C{H_3}COON{H_4} \to NH_4^ + + C{H_3}CO{O^ - } \\
N{a_2}C{O_3} \to 2N{a^ + } + CO_3^{2 - } \\
$
Among these salts, when we take NaCl and dissolve it in water, we have:
$2NaCl + {H_2}O \to 2HCl + 2NaOH$
As we can see, it is a salt of strong acid and strong base and has complete dissociation in water, it is the salt with highest pH. It’s pH will be equal to 7.
Hence, the correct option is A. \[NaCl\] .
Note:
The strong acid/weak base salt will give more $H^+$ ions in an aqueous solution, it will be comparatively of lower pH value than the salt of weak acid/strong base.
Complete step by step answer:
If we want to check the pH strength of any salt without going deep into its practical details, we can simply take the salt and put it into water. As soon as the salt is dropped in the water, it starts dissociating to form corresponding ions. In the case of the above mentioned salts, the ions formed will be:
$
NaCl \to N{a^ + } + C{l^ - } \\
N{H_4}Cl \to NH_4^ + + C{l^ - } \\
C{H_3}COON{H_4} \to NH_4^ + + C{H_3}CO{O^ - } \\
N{a_2}C{O_3} \to 2N{a^ + } + CO_3^{2 - } \\
$
Among these salts, when we take NaCl and dissolve it in water, we have:
$2NaCl + {H_2}O \to 2HCl + 2NaOH$
As we can see, it is a salt of strong acid and strong base and has complete dissociation in water, it is the salt with highest pH. It’s pH will be equal to 7.
Hence, the correct option is A. \[NaCl\] .
Note:
The strong acid/weak base salt will give more $H^+$ ions in an aqueous solution, it will be comparatively of lower pH value than the salt of weak acid/strong base.
Recently Updated Pages
Master Class 11 Physics: Engaging Questions & Answers for Success

Master Class 11 Chemistry: Engaging Questions & Answers for Success

Master Class 11 Biology: Engaging Questions & Answers for Success

Class 11 Question and Answer - Your Ultimate Solutions Guide

Master Class 11 Business Studies: Engaging Questions & Answers for Success

Master Class 11 Computer Science: Engaging Questions & Answers for Success

Trending doubts
Explain why it is said like that Mock drill is use class 11 social science CBSE

The non protein part of an enzyme is a A Prosthetic class 11 biology CBSE

Which of the following blood vessels in the circulatory class 11 biology CBSE

What is a zygomorphic flower Give example class 11 biology CBSE

The deoxygenated blood from the hind limbs of the frog class 11 biology CBSE

What is the function of copulatory pads in the forelimbs class 11 biology CBSE
