The pKa of dimethylamine and pKa of acetic acid are 3.27 and 4.77 respectively at T(K). The correct option for the pH of dimethylammonium acetate solution is :
The pKa of dimethylamine and pKa of acetic acid are 3.27 and 4.77 respectively at T(K). The correct option for the pH of dimethylammonium acetate solution is :
Option 1 - <p>8.50<br><!-- [if !supportLineBreakNewLine]--><br><!--[endif]--></p>
Option 2 - <p>5.50<br><!-- [if !supportLineBreakNewLine]--><br><!--[endif]--></p>
Option 3 - <p>7.75<br><!-- [if !supportLineBreakNewLine]--><br><!--[endif]--></p>
Option 4 - <p>6.25</p>
2 Views|Posted 5 months ago
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5 months ago
Correct Option - 3
Detailed Solution:
Dimethylammonium acetate is a weak acid & weak base type of salt.
pH = 7 + ½ pK? – ½ pK?
= 7 + ½ * 4.77 – ½ * 3.27
= 7.75
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