Zadania z chemii IB HL

Some users have asked for the water to be heated in winter. Suggest two reasons why leaving the water unheated is the better choice for the environment.

Suggest two reasons why less carbon dioxide is collected in the syringe when a greater mass rests on the piston.

The equilibrium constant, $K_\mathrm{c}$, for the reaction in (f) is $6.4 \times 10^{-5}$ at 80 °C. (i) $1.00\ \mathrm{dm^3}$ of a mixture that is initially $0.20\ \mathrm{mol\,dm^{-3}}$ in octadecanoic acid and $0.20\ \mathrm{mol\,dm^{-3}}$ in butan-2-ol is…

An indicator, HIn, is a weak acid with $\mathrm{p}K_a = 5.0$. HIn is yellow and its conjugate base, $\ce{In-}$, is blue. $\ce{HIn(aq) <=> H+(aq) + In^-(aq)}$ Which statements are correct? I. At pH 2.0 the indicator appears yellow. II. At pH 5.0 the…