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On adding of naoh to ch3cooh solution ,60% of the acid is neutralize.if pka of ch3cooh is 4.7 then pH of the resulting solution will be?
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On adding of naoh to ch3cooh solution ,60% of the acid is neutralize.i...
pH of the resulting solution after adding NaOH to CH3COOH solution


Introduction:

When NaOH is added to a solution of CH3COOH (acetic acid), a neutralization reaction takes place. The reaction can be represented as follows:


CH3COOH + NaOH → CH3COONa + H2O


The reaction shows that one molecule of CH3COOH reacts with one molecule of NaOH to form one molecule of CH3COONa (sodium acetate) and one molecule of water.


Given:

60% of the acetic acid is neutralized after adding NaOH.

pKa of CH3COOH = 4.7


Calculating the concentration of the remaining acetic acid:

Since 60% of the acetic acid is neutralized, it means that 40% of the acid remains unreacted.

Therefore, if the initial concentration of acetic acid is denoted as [CH3COOH]0, the concentration of the remaining acetic acid is:

[CH3COOH]remaining = 0.4 × [CH3COOH]0


Calculating the concentration of sodium acetate:

Since the reaction between CH3COOH and NaOH is 1:1, the concentration of sodium acetate formed is equal to the concentration of acetic acid neutralized.

[CH3COONa] = 0.6 × [CH3COOH]0


Calculating the pH of the resulting solution:

The pH of a solution can be calculated using the Henderson-Hasselbalch equation:

pH = pKa + log ([A-]/[HA])

Where [A-] is the concentration of the conjugate base (sodium acetate) and [HA] is the concentration of the acid (acetic acid).


Substituting the values into the equation, we have:

pH = 4.7 + log ([CH3COONa]/[CH3COOH]remaining)

pH = 4.7 + log (0.6 × [CH3COOH]0 / (0.4 × [CH3COOH]0))

pH = 4.7 + log (0.6 / 0.4)

pH = 4.7 + log (1.5)

pH = 4.7 + 0.18

pH ≈ 4.88


Conclusion:

The pH of the resulting solution after adding NaOH to the CH3COOH solution is approximately 4.88.
Community Answer
On adding of naoh to ch3cooh solution ,60% of the acid is neutralize.i...
More than 4.7 but less than 5.0
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On adding of naoh to ch3cooh solution ,60% of the acid is neutralize.if pka of ch3cooh is 4.7 then pH of the resulting solution will be?
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