A concentrated weak acid is best described as which of the following?

(a) a solution with a high pH
(b) a solution where the concentration of undissociated acid particles is high and relative quantity of hydronium ions is low
(c) a solution where the concentration of undissociated acid particles is low compared to the concentration of hydronium ions.
(d) a solution where the concentration of the hydronium ions is large compared to the concentration of undissociated acid particles

What would best suit as an answer. Im confused because I had originally thought c but c and d seem like the same answer.

If it is a concentrated solution of a weak acid the equilibrium will be on the side of the undissociated acid.

So:
the concentration of the undissociated acid will be high
the concentration of the dissociated acid will be low
the concentration of the dissociated H+ will be low.

a) is wrong as the pH will be low.

b) fits

c) is wrong because the concentration of undissociated acid particles is HIGH compared to the concentration of hydronium ions.

d) is wrong because concentration of the hydronium ions is LOW compared to the concentration of undissociated acid particles .

Thanks :)

Well, let me put my clown shoes on and make it less confusing for you!

A concentrated weak acid is best described as (c) a solution where the concentration of undissociated acid particles is low compared to the concentration of hydronium ions.
Now, let's visualize it with a joke:

Why did the weak acid go to therapy?
Because it had trouble dissociating its issues!

In other words, a concentrated weak acid has more hydronium ions (H3O+) compared to the undissociated acid particles. So, even though (d) might seem similar, it's not quite the same. The concentration of hydronium ions is large, but the concentration of undissociated acid particles is still relatively low in comparison.

Hope this clears things up, and don't hesitate to share a laugh or ask another question!

Based on the given options, the best description for a concentrated weak acid would be:

(d) a solution where the concentration of hydronium ions is large compared to the concentration of undissociated acid particles.

Option (c) is incorrect because it states that the concentration of undissociated acid particles is low compared to the concentration of hydronium ions, which is not the case for a concentrated weak acid.

To determine the best answer, let's consider the properties of a concentrated weak acid.

A weak acid is one that does not fully dissociate in water, meaning that only a portion of the acid molecules donate hydrogen ions (H+) to the solution. The concentration of undissociated acid particles refers to the unreacted acid molecules that remain in the solution.

In a concentrated solution, there is a relatively large amount of acid dissolved in a given volume of solution. This means that the concentration of undissociated acid particles is high, indicating the solution is relatively strong.

Now, let's examine the answer choices:

(a) A solution with a high pH: This answer is incorrect because weak acids have a low pH, not a high pH.

(b) A solution where the concentration of undissociated acid particles is high and the relative quantity of hydronium ions is low: This answer correctly describes a concentrated weak acid. In a concentrated solution, the concentration of undissociated acid particles is high, while the relative quantity of hydronium ions (H3O+) is low since the acid does not fully dissociate.

(c) A solution where the concentration of undissociated acid particles is low compared to the concentration of hydronium ions: This answer is incorrect because a low concentration of undissociated acid particles would indicate a dilute weak acid, not a concentrated one.

(d) A solution where the concentration of hydronium ions is large compared to the concentration of undissociated acid particles: This answer is incorrect because a high concentration of hydronium ions would indicate a strong acid, not a weak acid.

Therefore, the best answer would be (b) - a solution where the concentration of undissociated acid particles is high and the relative quantity of hydronium ions is low.