Chapter 18: Q177P (page 829)

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

Short Answer

Expert verified

HX is a stronger acid.

Step by step solution

To find the stronger acid

Given information:

${MM}_{HX} = 150 g / mol {MM}_{HY} = 50.0 g / mol HX : 12.0 g / Ln and HY : 6.00 g / L$

First, solve for the concentration of each weak acid.

HX: $[HX] = \frac{12.0 g \times \frac{1 mol}{150 g}}{L} = 0.08 M$

HY: $[H Y] = \frac{6.0 g \times \frac{1 mol}{50 g}}{L} = 0.12 M$

Compare $[HY] > [HX]$ . They have the same pH, therefore, they produced the same amount of $[H_{3} O^{+}]$ . A stronger acid will dissociate more, producing more $[H_{3} O^{+}]$ . Since they produced the same amount of $[H_{3} O^{+}]$ the stronger acid must have the lower concentration since it dissociated a largeramount of $[H_{3} O^{+}]$ compared to its initial concentration.

Therefore, the stronger acid is [HX].

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

Short Answer

Step by step solution

To find the stronger acid

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HX (μ=150g/moland HY(μ=50g/mol) are weak acids. A solution of 12.0g/Lof HX has the same pH as one containing 6.00g/Lof HY. Which is the stronger acid? Why

Short Answer

Step by step solution

To find the stronger acid

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Ionic and Molecular Compounds

Inorganic Chemistry

Chemical Analysis

Chemistry Branches

Nuclear Chemistry

Chemical Reactions

Study anywhere. Anytime. Across all devices.

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