Question

Which statement best describes the difference between a substance with a pH of 3.0 and a substance with a pH of 6.0?

Answer 1

The statement best describes the difference between a substance with a pH of 3.0 and a substance with a pH of 6.0 is - The substance with the lower pH has 1,000 times as many hydrogen ions per volume of water.

pH is the scale or measure for the substance about its acidic or basic strength. It ranges from 0 to 6.9 which is acidic and 7.1 to 14 which is basic.

Acidic substance has high concentration of Hydrogen ions whereas, basic substance has low concentration of hydrogen ions, however for the OH⁻ ions it is reverse.

• Concentration of hydrogen ions is inversely related to its pH
• More hydrogen ions present, the lower the pH
• The fewer hydrogen ions, the higher the pH We know,

pH = -log($H^{+}$) then,  

=> 3 = -log ($H^{+}$)

=> $H^{+}$ =  (for pH = 3)  

=> pH = -log($H^{+}$)

=> 6 = -log ($H^{+}$)

=> $H^{+}$ = $10^{-6}$ (for pH = 6)

 Thus, The substance with the lower pH (3) has 1000 times as many hydrogen ions per volume of water.

Learn more about pH scale:

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