All alkalis show characteristic chemical properties due to the presence of a specific ion in aqueous solution.
State the chemical formula of the ion responsible for the alkaline properties of these solutions.
A chemist prepares a standard solution of sodium hydroxide (NaOH\text{NaOH}NaOH) with a concentration of 18.5 g/dm318.5\text{ g/dm}^318.5 g/dm3. Calculate the mass of NaOH\text{NaOH}NaOH present in 220 cm3220\text{ cm}^3220 cm3 of this solution.