(a(i))[1]
State which negative ion has the smallest mass in 1000 cm$^3$ of toothpaste.
(a(ii))[1]
Name the substance containing NH$_4^+$ and Cl$^-$ ions.
(a(iii))[1]
Calculate the mass of phosphate ions in 250 cm$^3$ of toothpaste.
(b)[2]
Describe how to carry out a test for sulfate ions. test observations
(c)[1]
Deduce the formula of cinnamal so that the numbers of carbon, hydrogen and oxygen atoms are shown.
(d(i))[1]
Draw the carboxylic acid functional group so that every atom and every bond are shown.
(d(ii))[2]
Complete the word equation for the reaction of ethanoic acid with sodium carbonate. ethanoic acid + sodium carbonate → sodium ethanoate + [BLANK] + [BLANK]