Hi. So we've been given these questions on Amount of Substance and no matter how many ways that I attempt to answer, I can't find anyway to properly understand the question or to find the theory behind it. Any help would be appreciated.
Here's the Question:
A Pure solid is thought to be calcium hydroxide. The solid can be identified from its relative formula mass.
The relative formula mass can be determined experimentally by reacting a measured mass of the pure solid with an excess of HCl. The equation for this reaction is
Ca(OH)2 + 2HCl —> CaCl2 + 2H2O
The unreacted acid can then be determined by titration with a standard sodium hydroxide solution.
You are provided with 50.0 cm3 of 0.200 mol/dm3 HCl.
Outline, giving brief practical details, how you would conduct an experiment to calculate accurately the relative formula mass of the solid using this method.