Question

Several substances are labeled on the pH scale below.

A p H scale is shown ranging from 0 the top to 14 at the bottom. The approximate locations of substances are: gastric fluid, 1.2; lemon juice, 2.2; milk, 6.5; blood, 7.5; seawater, 8; milk of magnesia, upper M g (upper O upper H) subscript 2 solution, 10.5; household lye, upper N a upper O upper H solution, 13.5.

Which substance has the lowest [H+] concentration but is still considered an acid?
. milk
blood
gastric fluid
household lye
ITS A (milk)

Answer 1

Milk has the lowest [H+] concentration but is still considered an acid, with a pH of around 6.5-6.7, and a hydrogen ion concentration of about 1.6 x
`10^((-7))` moles per liter.

Milk has the lowest [H+] concentration but is still considered an acid, with a pH of around 6.5-6.7, and a hydrogen ion concentration of about 1.6 x
`10^((-7))` moles per liter. Gastric fluid is highly acidic with a pH of 1.5-3.5 and very high [H+]. Milk, with a pH of 6.5-6.7, has a much lower [H+] concentration, making it the substance with the lowest [H+] concentration but still considered an acid.

The hydrogen ion concentration of milk is about 1.6 x
`10^((-7))` moles per liter, which corresponds to a pH of around 6.5-6.7.

Therefore, among the given substances, milk is the one that has the lowest [H+] concentration but is still considered an acid.