Why does vinegar make steel marbles rust faster than water?

Question

Why does vinegar make steel marble rust faster than
water, beer, and Pepsi?
Can you please explain how it rusts?

Answer 1

Well, mainly because vinegar is acidic. From the list above, the rate at which rust is formed will increase from Water to beer to pepsi... You can actually determine the pH of these liquid to give an indication of how fast rusting proceeds.

And you also have to take a look on the reaction:
Iron can be oxidised:
Fe(s) -> Fe2+(aq) + 2e-
Oxidation gives out 2 electrons which can reacted with the oxygen in water and dissociated hydrogen in the form of H3O+

4e-(aq) + 4H3O+(aq) + O2(aq) -> 6H2O(l)
From here, the more acidic the solution, the more H3O+ present, hence speeding up the process in the case of vinegar.

The cations once formed then react with the OH- or even the H3O+ ions and dissolved oxygen to form a variety of compounds, which constitute rust:

Fe2+(aq) + 2OH-(aq) -> Fe(OH)2(s)

4Fe2+(aq) + 4H+(aq) + O2(aq) -> 4Fe3+(aq) + 2H2O(l)

Fe3+(aq) + 3OH-(aq) -> Fe(OH)3(s) (rust)

Thus, from the equation the present of H+ or H3O+ do speed up the process quickly...

Answer 2

The acidity in the vinegar makes the steel marbles oxidize faster because the pH is lower than that in Pepsi beer and water.

Answer 3

Steel contains large quantities of iron, and it is iron that forms the reddish rust. The reaction proceeds like this:

1.
Iron atoms are pulling into aqueous solution, losing electrons:
Fe(s) --> Fe 2+(aq) + 2 e-

2.
The electrons react with hydronium ions, which are always present in water, to form water:
4 e-(aq) + 4 H3O+(aq) + O2(aq) --> 6 H2O(l)

3.
The iron ions combine with hydroxide ions to form several compounds, including iron oxide and iron hydroxide
Fe 2+(aq) + O 2-(aq) --> FeO (s)
Fe 2+(aq) + 2 OH-(aq) --> Fe(OH)2(s)

Now, vinegar is just acetic acid, and acids are substances that produce H3O+ (hydronium) ions in water. The abundance of H3O+ ions causes step 2 of the reaction to proceed faster. Basically, the more acidic the water, the faster rusting will occur.

Answer 4

add some protons.