Malonic acid (Ka1 = 1.42 x 10–3, Ka2 = 2.01 x 10–6) can exist as one of the 3 forms shown below. What is the pH of a 0.1000 M solution of malonate

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Malonic acid (Ka1 = 1.42 x 10–3, Ka2 = 2.01 x 10–6) can exist as one of the 3 forms shown below.

What is the pH of a 0.1000 M solution of malonate?

The image shows a series of chemical structures representing the dissociation process of malonic acid. This process is depicted with equilibrium arrows indicating reversible reactions.

1. **Malonic acid**: This is the initial structure, characterized by a carbon backbone with two carboxylic acid groups (HOOC-CH2-COOH). 

2. **Hydrogen malonate**: The structure appears after the first dissociation step, where one of the hydrogen ions is lost, represented as HOOC-CH2-COO⁻. This intermediate form is also shown with equilibrium arrows indicating that it can revert back to malonic acid or proceed to the next dissociation.

3. **Malonate**: In the second dissociation step, the other hydrogen ion is removed, resulting in the dianion form, represented as ⁻OOC-CH2-COO⁻.

Each structure is labeled appropriately beneath the chemical formula, and the equilibrium arrows signify that each step of deprotonation is reversible.
Transcribed Image Text:The image shows a series of chemical structures representing the dissociation process of malonic acid. This process is depicted with equilibrium arrows indicating reversible reactions. 1. **Malonic acid**: This is the initial structure, characterized by a carbon backbone with two carboxylic acid groups (HOOC-CH2-COOH). 2. **Hydrogen malonate**: The structure appears after the first dissociation step, where one of the hydrogen ions is lost, represented as HOOC-CH2-COO⁻. This intermediate form is also shown with equilibrium arrows indicating that it can revert back to malonic acid or proceed to the next dissociation. 3. **Malonate**: In the second dissociation step, the other hydrogen ion is removed, resulting in the dianion form, represented as ⁻OOC-CH2-COO⁻. Each structure is labeled appropriately beneath the chemical formula, and the equilibrium arrows signify that each step of deprotonation is reversible.
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