Question

the following molecule is added to water. which will happen to the water? a. the hydrogen ion concentration would increase and the ph would increase b. the hydrogen ion concentration would decrease and the ph would decrease c. the hydrogen ion concentration would increase and the ph would decrease d. the hydrogen ion concentration would decrease and the ph would increase make sure everyone in your group has had a chance to share a question about or a possible explanation for this question. maybe someone in the group can draw a diagram to help.

Explanation:

Step1: Identify the molecule

The molecule has a carboxylic - acid group (-COOH). Carboxylic acids are acidic substances.

Step2: Recall acid - base concept

When an acid is added to water, it donates a proton (H⁺) to water. So, the hydrogen - ion (H⁺) concentration in water increases.

Step3: Recall pH formula

The pH is defined as $pH =-\log[H^{+}]$. As $[H^{+}]$ increases, the value of $-\log[H^{+}]$ decreases. So, the pH decreases.

Answer:

C. The hydrogen ion concentration would increase and the pH would decrease