Question

the goal of an experiment to determine the concentration of hydrochloric acid using a standard solution of sodium bicarbonate

Answer 1

Answer:

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Explanation:

Acid-base titration methods based on the dissolution of a sample in excess of standard acid, followed by back titration with a standard base. The hydrochloric acid solutions were standardized against pure sodium carbonate using bromophenol blue as an indicator

Answer 2

Answer:

Pure sodium carbonate is a non-hygroscopic primary standard reagent. A standard solution prepared by dissolving a known amount of the solid Na2CO3in a fixed volume can be used to standardize other acid solutions. The aim of the experiment is to prepare a standard solution of exact concentration which can later be used to standardize other solutions. HCl is not a primary standard. Thus, after a dilute HCl solution is prepared, it must be standardized with a primary standard solution in order to determine its concentration accurately. In this experiment a standard Na2CO3solution and a dilute HCl solution will be prepared. The HCl solution will later be standardized against the Na2CO3solution. The reaction between HCl and Na2CO3is as follows. 2 HCl + Na2CO3 ⎯→2 NaCl + H2O + CO2