What is the hydrogen ion concentration in orange juice The pH is 4.0?

The hydrogen ion concentration can be calculated using the formula ([H^+] = 10^{-\text{pH}}). For Orange Juice with a pH of 4.0, the hydrogen ion concentration is ([H^+] = 10^{-4.0}), which equals 0.0001 moles per liter, or 1 x 10⁻⁴ M. This indicates a moderately acidic solution, typical for orange juice.