Question

How do the products of these chemical equations can affect the pH of an aqueous solution?

NaOH+HCl-> NaCl + H2O and CH3COOH +NaOh -> CH3COO- +Na+ +H2O

Answer 1

The product of the first reaction is NaCl and water which essentialy menas that the solution turns neutral at the formation of the product.Thus the acidic reactents form the neutral product and as a result the pH increases from the acidic range to the neutral range.

The second reaction is essentially the formation of actate ( which is the conjugate base of the acetic acid) and the Na+ and water from the acetic acid and the sodium hydroxide base. Thus this reaction does not show any significatnt change in the pH level in the solution. THis is the typical example of the bronsted acid )acetic acid) dissociating to form its conjugate base(sodium acetate) and water.