Zadania z chemii IB HL

Sketch, on the axes provided, the pH curve for this titration.

What is the best indicator to use in the titration of propanoic acid with potassium hydroxide? A. Methyl orange, $\mathrm{p}K_\mathrm{a} = 3.7$ B. Bromocresol green, $\mathrm{p}K_\mathrm{a} = 4.7$ C. Bromothymol blue, $\mathrm{p}K_\mathrm{a} = 7.0$ D.…

The pH curve below was obtained when sodium hydroxide solution was added to a sample of ethanoic acid until the base was in excess. Which indicator would be most suitable for this titration? A. Methyl red, p$K_\mathrm{a}$ = 5.1 B. Phenolphthalein,…

Hexanoic acid, $\ce{CH3(CH2)4COOH}$, is a weak acid. The graph shows how the pH changes during the titration of a 20.0 $\mathrm{cm^3}$ aqueous solution of hexanoic acid with aqueous sodium hydroxide. (i) Deduce an expression for the equilibrium constant, $K$,…