Which of the following solutions has the highest concentration of hydroxide ions? a) NaCl b) HCl c) C6H12O6 d) NaOH

Question

Which of the following solutions has the highest concentration of hydroxide ions?

a) NaCl b) HCl c) C₆H₁₂O₆ d) NaOH

Explain your answer, in terms of what kind of substance it is:

Answer 1

Hello, Jenn,

My first reaction was "but we need the concentrations," but then I noticed NaOH among other compounds that are either acidic or neutral.

NaOH is a strong base. It is an ionic compound that readily dissolves in water, creating OH^- and Na⁺ ions. HCl is a strong acid, NaCl is a relatively neutral salt, and C6H12O6 is a sugar molecule. It also dissolves, but hs little impact on the pH.

NaOH contributes the most hydroxide ions per unit of solute.

Bob

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