F-(aq) + H2O(l) ⇔ HF(aq) + OH-(aq)
If water is acting as an acid in this reaction, which of the following is true?
A.
The water accepts H+ from F-.
B.
The water donates H+ to F-.
C.
The F- donates OH- to water.
D.
The F- accepts OH- from water.
A. The water accepts H+ from F-.
The correct answer is B. The water donates H+ to F-.
To determine which option is true, we need to understand the concept of acids and bases and their reactions.
In the given reaction, we can see that water (H2O) is reacting with F- (fluoride ion) to form HF (hydrofluoric acid) and OH- (hydroxide ion):
F-(aq) + H2O(l) ⇔ HF(aq) + OH-(aq)
In this reaction, water can act as either an acid or a base. An acid is a substance that donates a proton (H+ ion), while a base is a substance that accepts a proton.
Let's analyze each option:
A. The water accepts H+ from F-.
This option suggests that the water acts as a base by accepting a proton (H+) from F-. However, in the given reaction, the water is acting as an acid, not a base. Therefore, option A is not correct.
B. The water donates H+ to F-.
This option suggests that the water acts as an acid by donating a proton (H+) to F-. In this reaction, the water indeed acts as an acid because it donates an H+ ion to F-. Therefore, option B is correct.
C. The F- donates OH- to water.
This option suggests that F- donates OH- to water, but in the given reaction, F- is not involved in donating OH- ions to water. Therefore, option C is not correct.
D. The F- accepts OH- from water.
This option suggests that F- accepts OH- from water, but in the given reaction, OH- is not formed from water. Therefore, option D is not correct.
So, the correct answer is B. The water donates H+ to F-.