Question

complete the sentences using the words provided. 1. a(n) (click to select) acts to increase the hydrogen ion concentration of a solution. 2. a(n) (click to select) acts to decrease the hydrogen ion concentration of a solution. 3. a(n) (click to select) acts to maintain a relatively stable concentration of hydrogen ions in a solution. 4. as the hydrogen ion concentration of a solution decreases, the ph (click to select). 5. as the ph of a solution increases, the concentration of (click to select) ions increases. 6. the ph of a solution is defined as the (click to select) of the hydrogen ion concentration. 7. as the hydrogen ion concentration of a solution increases, the ph (click to select).

Explanation:

1. An acid donates hydrogen ions, increasing their concentration.
2. A base accepts hydrogen ions, decreasing their concentration.
3. A buffer resists changes in hydrogen - ion concentration.
4. Since pH = -log[H⁺], as [H⁺] decreases, pH increases.
5. As pH increases, the solution becomes more basic and the hydroxide ion (OH⁻) concentration increases.
6. pH is defined as the negative logarithm of the hydrogen - ion concentration.
7. Since pH = -log[H⁺], as [H⁺] increases, pH decreases.

Answer:

1. acid
2. base
3. buffer
4. increases
5. hydroxide (OH⁻)
6. negative logarithm
7. decreases