Question

Calculate the molar hydrogen ion concentration of each of the following biological solutions given the pH.

Saliva, pH=6.38
Express your answer using two significant figures.

Blood, pH=7.41
Express your answer using two significant figures.

Answer 1

pH = -log[H^+] \\ [H^+] = 10^{-pH} \\ Saliva \; [H^+] = 10^{-6.38} = 4.1 \times 10^{-7} \;M \\ Blood \; [H^+] = 10^{-7.41} = 3.8 \times 10^{-8} \;M