Which positive ion has the greatest concentration?
State the name of the $\text{SO}_3^{2-}$ ion.
Calculate the mass of silicate ions in $250\text{ cm}^3$ of this sample.
Calculate the mass of solid obtained when all the water has evaporated from the $1000\text{ cm}^3$ sample.
Name the compound made from $\text{Ca}^{2+}$ ions and $\text{HCO}_3^{-}$ ions.
Describe a test for sodium ions. test … observation …
The formulas of several chlorides are shown: aluminium chloride, $\text{AlCl}_3$; calcium chloride, $\text{CaCl}_2$; sodium chloride, $\text{NaCl}$. Deduce the formula of magnesium chloride.
Molten calcium chloride can be electrolysed with inert electrodes. Predict the products at the negative electrode (cathode) and the positive electrode (anode).