Buffers and Neutralisation - exam practice
Buffers and Neutralisation
Question 1 of 7
1 of 7
Which two solutions, both of concentration 0.10 mol dm-3, have been used to produce this titration curve?
Question 2 of 7
2 of 7
When equimolar amounts of the solutions below are mixed, which forms a buffer solution with a pH less than 7?
Question 3 of 7
3 of 7
The indicator methyl orange is a weak acid and may be represented by the formula HA(aq). The equation for its dissociation is shown below.
HA(aq) ⇌. A- + H+(aq)
Colour: Red Yellow
Under certain conditions, at equilibrium, a solution of HA has a yellow colour.
On addition of a small volume of dilute sodium hydroxide, the colour of this solution would
Question 4 of 7
4 of 7
A buffer solution is prepared by mixing 200 cm3 of 2.00 mol dm-3 propanoic acid, CH3CH2COOH, with 600 cm3 of 1.00 mol dm-3 sodium propanoate, CH3CH2COONa.
Ka for CH3CH2COOH = 1.32 × 10-5 mol dm-3
What is the pH of the buffer solution?
Question 5 of 7
5 of 7
The diagram shows a pH curve produced by adding a strong alkali to a weak acid.
Which point on the curve represents a solution that can act as a buffer?
Question 6 of 7
6 of 7
A 0.10 mol dm-3 aqueous solution of an acid is added slowly to 25 cm3 of a 0.10 mol dm-3 aqueous solution of a base.
Which acid–base pair has the highest pH at the equivalence point?
Question 7 of 7
7 of 7
A buffer solution always...