Chapter 1.5, Problem 303E

[T] The concentration of hydrogen ions in a substance is denoted by $\left[H^{+}\right]$ , measured in moles per liter. The pH of a substance is defined by the logarithmic function $pH=-\log \left[H^{+}\right]$ . This function is used to measure the acidity of a substance. The pH of water is 7. A substance with a pH less than 7 is an acid, whereas one that has a pH of more than 7 is a base.

1. Find the pH of the following substances. Round answers to one digit.
2. Determine whether the substance is an acid or a base.

   $\begin{array}{l}i.Eggs:\left[H^{+}\right]=1.6\times {10}^{-8}mol/L\\ ii.Beer:\left[H^{+}\right]=3.16\times {10}^{-3}mol/L\\ iii.TomatoJuice:\left[H^{+}\right]=7.94\times {10}^{-5}mol/L\end{array}$