Q177P - Chemistry: Molecular Nature Of Matter And Change

Question

HX ( $\mathbf{\mu }\mathbf{=}\mathbf{150}\mathbf{ }\mathbf{g}\mathbf{/}\mathbf{mol}$ and HY( $\mathbf{\mu }\mathbf{=}\mathbf{50}\mathbf{ }\mathbf{g}\mathbf{/}\mathbf{mol}$) are weak acids. A solution of 12.0 g/Lof HX has the same pH as one containing 6.00 g/Lof HY. Which is the stronger acid? Why

Step-by-Step Solution

Answer

HX is a stronger acid.

Step 1: Identify the acid-base problem

Determine strong/weak acid/base, buffer, or titration.

Step 2: Write relevant equations

Use pH = -log[H+], Ka expression, or Henderson-Hasselbalch.

Step 3: Calculate

Substitute values and solve.

Step 4: State the answer

The answer is:

HX is a stronger acid.