(a(i))[1]
State which positive ion has the greatest concentration.
(a(ii))[1]
Name the compound made from NH$_4^+$ and SO$_4^{2-}$ ions.
(a(iii))[1]
Calculate the mass of magnesium ions present in 400 cm$^3$ of rainwater.
(b)[2]
Describe a test for chloride ions. State the test and the observation.
(c(i))[1]
On the structure, draw a circle round one alcohol functional group.
(c(ii))[1]
Deduce the formula of tartaric acid so that the numbers of carbon, hydrogen and oxygen atoms are shown.
(d)[2]
Complete the table so you can calculate the relative molecular mass of compound A.