(a)[3]
Draw a diagram of the filtration apparatus used to separate the soil from the solution formed after the soil is shaken with distilled water. On your diagram, label: the filtrate; the residue.
(b(i))[1]
Name the negative ion with the smallest concentration.
(b(ii))[1]
State the name given to the SO$_4^{2-}$ ion.
(b(iii))[1]
Calculate the mass of phosphate ions present in 200 cm^{3} of the solution.
(c)[2]
Complete Fig. 2.1 to show: the electronic configuration of a sodium ion; the charge on the ion.
(d)[1]
Choose from the list the gas that is essential for aquatic life. Draw a circle around your selected answer. argon hydrogen nitrogen oxygen
(e)[2]
State one harmful effect of each of these water pollutants. sewage ………………… nitrates …………………