Question

ph, acids and bases quick check which statement best describes the difference between a substance with a ph of 3.0 and a substance with a ph of 6.0? (1 point) the substance with the lower ph has twice as many hydrogen ions per volume of water. the substance with the lower ph has 1,000 times as many hydrogen ions per volume of water. the substance with the higher ph has 1,000 times as many hydrogen ions per volume of water. the substance with the higher ph has twice as many hydrogen ions per volume of water.

Explanation:

Step1: Recall pH - hydrogen ion concentration relationship

The pH scale is logarithmic, where \(pH=-\log[H^+]\), and a difference of \(n\) in pH values means a difference of \(10^n\) in hydrogen - ion concentration.

Step2: Calculate the difference in hydrogen - ion concentration

The difference in pH values between a substance with pH = 3.0 and a substance with pH = 6.0 is \(6 - 3=3\).
Since the pH scale is logarithmic, a difference of 3 in pH means a difference of \(10^3 = 1000\) in hydrogen - ion concentration. A lower pH means a higher hydrogen - ion concentration. So the substance with the lower pH has 1000 times as many hydrogen ions per volume of water.

Answer:

The substance with the lower pH has 1000 times as many hydrogen ions per volume of water.