Unit C: OUTCOME 2 :) Flashcards
What is an Arrhenius acid?
A substance that produces H⁺ ions in water.
What is an Arrhenius base?
— A substance that produces OH⁻ ions in water.
What ion is produced when HCl dissolves in water
H⁺ and Cl⁻ ions.
What is the formula of a hydronium ion?
H₃O⁺
Why can’t H⁺ exist alone in water?
It immediately reacts with H₂O to form H₃O⁺.
What ion is responsible for acidic properties?
H₃O⁺ (hydronium ion)
What ion is responsible for basic properties?
OH⁻ (hydroxide ion)
Who discovered the hydronium ion?
Paul Giguère in 1957
What does H₃O⁺ represent?
A proton bonded to a water molecule
What is the pH scale used for?
To express [H₃O⁺] in a more convenient way.
What is the pH of a neutral solution?
7
Is pure water completely non-conductive?
No, it has slight ionization
What is the relationship between pH and pOH?
pH + pOH = 14
What happens to pH as [H₃O⁺] concentration increases?
pH decreases
What happens to pH as [OH⁻] concentration increases?
pH increases
Which ion do acids increase in solution?
H₃O⁺
Which ion do bases increase in solution?
OH-
Is a pH of 2 stronger or weaker than a pH of 5?
stronger
