The hydroxide ion concentration in a sample of lemon juice is 1.9 x 10^-12 2.28 4.3 5.2 11.72 1.92 x 10^-12

[OH⁻] = 1.9 × 10⁻¹² M

Explanation:

The pH of lemon juice is 2.3. We can calculate the pOH using the following expression.

pH + pOH = 14

pOH = 14 - pH

pOH = 14 - 2.3 = 11.7

The pOH is 11.7. We can calculate the concentration of the hydroxide ion using its definition.

pOH = -log [OH⁻]

- pOH = log [OH⁻]

[OH⁻] = anti log (- pOH)

[OH⁻] = anti log (- 11.7)

[OH⁻] = 1.9 × 10⁻¹² M

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.