Passage VII
A carboxylic acid (CA) is a compound that contains a —COOH group. When a CA dissolves in H2O, it can dissociate, as shown below.
An atom's electronegativity (EN) indicates the atom's ability to attract electrons within a molecule (see Table 1). The presence of an electronegative atom in a CA, and the atom's proximity to the —COOH group, can affect the acidity of a CA.
Table 2 gives the pH of aqueous 1.00 M (mole per liter) CA solutions at 25°C. The CA in each solution is either an acetic acid or a propanoic acid (see Figure 1), where X and Y each represent an atom listed in Table 1.
36. Based on Figure 1 and Table 2, which of the following is the structure of 2-iodopropanoic acid?
Your Answer is
Correct Answer is J
Explanation
Look at the 2-iodopropanoic acid in table 2, the formula is CH3CIHCOOH, corresponding to the General structure for Propanoic acid in figure 2, just replace Y with I