(a(i))[1]
State which positive ion has the least mass in $1000\text{ cm}^3$ of toothpaste.
(a(ii))[1]
Name the compound formed from $\text{Mg}^{2+}$ and $\text{SO}_4^{2-}$ ions.
(a(iii))[1]
Calculate the mass of sodium ions present in $200\text{ cm}^3$ of toothpaste.
(b)[2]
Describe a test for chloride ions. State the test and the observation.
(c)[1]
Deduce the formula of glycerol to show the numbers of carbon, hydrogen and oxygen atoms.
(d(i))[1]
Draw the structure of ethanol so that every atom and every bond is visible.
(d(ii))[2]
Name the two products made when ethanol undergoes complete combustion.
(d(iii))[1]
Give one application of ethanol.