Question

4. Acetic acid is a weak acid and sodium hydroxide is a strong base, would you expect the equivalence point for this titration to be above pH 7, at pH 7, or below pH 7? Explain why this is the case. 5. Figure 3 shows the intermolecular forces present in 1-octanol. Identify and label these forces. Figure 3. 6. Sketch a diagram showing the intermolecular forces between acetic acid and water. 7. Sketch a diagram showing the intermolecular forces between acetic acid and loctanol

Answer 1

Solution:

The pH at equivalence point is always greater than 7.

Explanation:

Acetic acid is a weak acid. When it reacts with NaOH, it forms a strong basic salt (sodium acetate) and water. Thus, solution becomes basic and therefore pH at equivalence point will be obtained greater than 7.

The reaction between acetic acid (CH3COOH) and sodium hydroxide (NaOH) can be written as,

CH3COOH ( weak acid) + NaOH = CH3COONa (salt of strong base) + H2O