Apple juice has a lower ph than black coffee. which best explains the relationship?
a. apple juice has fewer hydrogen ions than black coffee.

b. apple juice has more hydrogen ions than black coffee.

c. apple juice has the same number of hydroxide ions as black coffee.

d. apple juice has more hydroxide ions than black coffee.

Answer is: B. Apple juice has more hydrogen ions than black coffee.

pH value (potential of hydrogen - [H+]) is a logarithmic scale that specify the acidity or basicity of an aqueous solution.

When pH is greater than seven, aqueous solution is basic, below seven is acidic and when pH is equal seven, solution is neutral.

pH = -log[H+].

[H+] = 10∧(-pH).

pH(aplle juice) < pH(black coffee).