AP Chemistry Titration

What are some things we will need for a titration?

• A solution of known concnetration

• A burette

• indicator

• mass balance

• a bunsen burner

What is this apparatus used for titration called?

• Burette

• Volumetric Pipette

• Pipette filler

• Volumetric flask

A student carried out a titration to determine the concentration of an acid and found that his value had good precision but poor accuracy. Which process explains this outcome?

• Consistently overshooting the volume of solution from the burette into the flask.

• Collection of insufficient titration data.

• Reading the meniscus in the burette at a different angle each time.

• Forgetting to rinse the flask after one of the titrations.

If 20 cm³ samples of 0.1 moldm⁻³ solutions of the acids below are taken, which acid would require a different volume of 0.1 moldm⁻³ sodium hydroxide for complete neutralization?

• Nitric acid

• Sulfuric acid

• Ethanoic acid

• Hydrochloric acid

What is the difference between a conjugate Brønsted–Lowry acid–base pair?

• Electron pair

• Positive charge

• Proton

• Hydrogen atom

Which two species act as Brønsted–Lowry acids in the reaction?

• HPO₄²⁻ (aq) and OH⁻ (aq)

• H₂PO₄⁻ (aq) and HPO₄²⁻ (aq)

• HPO₄²⁻ (aq) and H₂O (l)

• H₂PO₄⁻ (aq) and H₂O (l)

What describes HPO₄²⁻?

• Amphiprotic but not amphoteric

• Amphoteric but not amphiprotic

• Amphiprotic and amphoteric

• Neither amphiprotic nor amphoteric

Which is an acid-base conjugate pair?

• H₃O⁺ / OH^–

• H₂SO₄ / SO₄^2–

• CH₃COOH / H₃O⁺

• CH₃NH₃⁺ / CH₃NH₂

Which of the following is correct?

• A weak acid is a proton donor and its aqueous solution shows good conductivity.

• A weak acid is a proton donor and its aqueous solution shows poor conductivity.

• A weak acid is a proton acceptor and its aqueous solution shows good conductivity.

• A weak acid is a proton acceptor and its aqueous solution shows poor conductivity.

Which species acts as a Lewis and Brønsted–Lowry base?

• [Al(H₂O)₆]³⁺

• BF₃

• NH₄⁺

• OH⁻