One brand of vinegar has a pH of 4.5. Another brand has a pH of 5.0. The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. What is the approximate difference in the concentration of hydrogen ions between the two brands of vinegar?

A. 2.2 x10^-5
B. 3.2x10^-1
C. 3.2x10^1
D.6.8x10^4

Question

One brand of vinegar has a pH of 4.5. Another brand has a pH of 5.0. The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. What is the approximate difference in the concentration of hydrogen ions between the two brands of vinegar?

A. 2.2 x10^-5
B. 3.2x10^-1
C. 3.2x10^1
D.6.8x10^4

anonymous · Answer

$$pH_1=4.5\pH_2=5$$$$[H_1^+]=10^{-4.5}$$$$[H_2^+]=10^{-5}$$$$\Delta H^+=[H_1^+]-[H_2^+]=3.2\times10^{-5}-1.0\times10^{-5}=\boxed{2.2\times10^{-5}}$$