Question

What has a pH of 1?

Answer 1

1. pH is the negative log of Hydrogen ion concentration.
   $\mathrm{pH}=-\log \left[{\mathrm{H}}_3{\mathrm{O}}^{+}\right]$
2. The stronger the acid, the lower its pH value.
3. The pH of our stomach or gastric acid is highly acidic and is pH 1 or 2.
4. Our stomach contains disposable cells which are constantly being replaced.