Calculate to 2 decimal places, the ratio of base/acid at pH 12. Show all details of your working out. In each step of your working out use the chemical formulas of the compounds that constitute the weak acid and conjugate base. State the final answer in a complete sentence.

I'm sorry, but you didn't provide a specific weak acid to work with. However, I can show you how to calculate the ratio of base/acid at a given pH using the Henderson-Hasselbalch equation. This equation is often used to estimate the pH of a buffer solution, or to estimate the equilibrium pH in an acid-base reaction. The equation is as follows:

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

Where:

• pH is the pH of the solution,
• pKa is the acid dissociation constant,
• [A-] is the concentration of the base (the conjugate base of the acid),
• [HA] is the concentration of the acid.

To find the ratio of base/acid ([A-]/[HA]), you can rearrange the equation as follows:

[A-]/[HA] = 10^(pH - pKa)

Let's say we're dealing with acetic acid (CH3COOH) and its conjugate base acetate (CH3COO-). The pKa of acetic acid is approximately 4.76.

So, if the pH is 12, the ratio of base/acid would be:

[CH3COO-]/[CH3COOH] = 10^(12 - 4.76) = 10^7.24

This is a very large number, indicating that at a pH of 12, the concentration of the base (acetate) is much higher than the concentration of the acid (acetic acid).

Please note that this is a simplified explanation and actual calculations may involve more complex considerations depending on the specific conditions of the solution.