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Finding the Concentration of Hydrochloric Acid by Titration Na2CO3 + 2HCl = 2NaCl + H2O + CO2 The sodium carbonate in this solution is what we call the standard solution as it is the one which we know the concentration of accurately. This is because we have measured out an amount of sodium chloride (solid) to 1/100th gram, and then put this into a 100ml volumetric flask which was filled exactly to the 100ml mark. Mass of weighing boat: 1.325 Mass of weighing boat and sodium carbonate 3.942 Total weight 5.262 Sodium chloride is neither deliquescent nor efflorescent. This means that it does not take in water from the atmosphere, nor does it give out water to the atmosphere. This means that the mass is purely sodium chloride and nothing else.Na2CO3 has a relative formula mass of 106g. Method When the contents of the weighing boat was poured into the small beaker it was important to add the...

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