You could say Water.
Its technically both an acid and an alkali since it does both but not much.
Its able to both give and receive protons (hydrogen atoms).
Thats why its pH, 7, is considered neutral.
But you could just say very very diluted hydrochloric acid.
The weakest acid known is going to be placed right before neutral (7) on the pH scale. This question is difficult to answer, because there are so many acids in nature, including organic acids. Most acids are weak acids. If you had a list to choose from, you could have a better answer.
The Ka values that represent the weakest acid are low numbers. For instance, hydronium ion (H3O+) is a weak acid with a Ka of 1.0. On the other hand, hydrogen sulfide (H2S) is a strong acid with a Ka of 9.1 x 10-8.
The highest pH an acid can have is just below 7.
Hydrogen fluoride is a weak acid but it is by no means the weakest. It is actually stronger than most other weak acids. It is a weak acid because the H-F bond is fairly strong and difficult to break, so it only dissociates to a small degree in water.
The pH of the weakest acid would likely be close to neutral, around 6-7, as weak acids only partially ionize in water resulting in a small concentration of H+ ions and a slightly acidic pH.
Please state what kind of learning that we are weakest? Weakest learning in what? If you meant it on the weakest learning in Subject then my weakest learning is my Algebra and calculus.
You are the weakest link.The weakest in the herd are sacrificed to save the youngest.
volcanic rocks like flint are very resistant to even strong acids while carbonate stones like limestone are the weakest
There is no such thing as the weakest race.
what is your weakest academic
Neap tides are the weakest
Weakest to strongest: H2O, HCl, H2S, HI. This ranking is based on the strength of the acids determined by their ability to donate protons. HI is the strongest acid in the list due to its highly polar bond between hydrogen and iodine, making it the easiest to dissociate and donate protons.