What is the molar concentration of a dilute HCI solution if the addition of 10.89 mL of the acid to 0.219 g of primary standard Na2CO3 (105.99 g/mol) required a 4.85-mL back-titration with 0.047 M HBr? Pertinent equations: 2HCI + Na₂CO32NaCl + H₂CO3 2HBr + Na₂CO3 2NaBr + H₂CO3

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.