Answer the following question given this paragraph: 

The strength of an acid depends on how many hydrogen ions it produces when it dissolves in water. A stronger acid produces more hydrogen ions than a weaker acid. For example, sulfuric acid (H 2 SO 4 ), which is found in car batteries, is a strong acid because nearly all of it breaks down into ions when it dissolves in water. On the other hand, acetic acid (CH 3 CO 2 H), which is the acid in vinegar, is a weak acid because less than 1 percent of it breaks down into ions in water.


Q: The strength of an acid depends on how many of which ions it produces when it dissolves in water?

 Choices:

- silicon

- carbon

- helium

- hydrogen

A:
hydrogen
