The stoichiometric relationship between the reactants andproducts of an aqueous reaction can be used to determine differentkinds of information about a reaction, such as the volume of agiven molarity reactant required to produce a certain amount ofproduct.
Hydrochloric acid (HCl) reacts with sodium carbonate (Na2CO3),forming sodium chloride (NaCl), water (H2O), and carbon dioxide(CO2). This equation is balanced as written:
2HCl(aq)+Na2CO3(aq)→2NaCl(aq)+H2O(l)+CO2(g)
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a) What volume of 2.00 M HCl in liters is needed toreact completely (with nothing left over) with 0.250 L of 0.300M Na2CO3?
Express your answer numerically in liters.
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b) A 373-mL sample of unknown HCl solution reacts completelywith Na2CO3 to form 19.1 g CO2. What was the concentration of theHCl solution?
Express the molar concentration numerically.
