Acid base titrations

Which of the following is the Bronste/Lowry definition of a strong acid

• It completely dissociates in water to give hydrogen ions

• It partially dissociates in water to give hydrogen ions

• Its is a good proton donor

• It is a good proton acceptor

Which of the following is the Arrhenius definition of a weak base

• It completely dissociates in water to give Hydroxide ions

• It partially dissociates in water to give Hydroxide ionsions

• Its is a poor proton donor

• It is a poor proton acceptor

Which of the following is the Bronsted/Lowry definition of a weak base

• It completely dissociates in water to give Hydroxide ions

• It partially dissociates in water to give Hydroxide ionsions

• Its is a poor proton donor

• It is a poor proton acceptor

A conjugate acid-base pair is......

• any pair consisting of an acid and base that differ by one hydrogen atom

• An acid and base that will react completely in a titration

• any pair consisting of an acid and base that differ by one proton

• An acid and base that will neutralise each other.

Which of the following is the conjugate base of H₃PO₄

• H₂PO₄⁺

• HPO₄²⁺

• H₂PO₄^-

• PO₄^3-

Which of the follong is a dibasic acid

• H₃PO₄

• H₂SO₄

• HCl

Whic of the following are false statements

• A conjugate base can be an acid

• An acid and base will react to give a water +salt

• A weak base is a poor proton acceptor

• A conjugate base is always a proton acceptor

Which of the folling are suitable characteristics of a primary standard?

• Available in high purity

• Must be stable

• Must be insoluble

• Must have a low M_r

• Must be anhydrous

What mass of Sodium Carbonate (Na₂CO₃) must be added to a 1 litre volumetric flask in order to make a solution of 2M You may round off the numbers

• 106g

• 200mg

• 212mg

• 212g

What mass of Sodium Carbonate (Na₂CO₃) must be added to a 500cm³ volumetric flask in order to make a solution of 0.1M You may round off the numbers

• 56g

• 5.6g

• 10.6g

• 212g