Question

4. The stoichiometric relationship between the reactants and products of an aqueous reaction can be used to determine different kinds of information about a reaction, such as the volume of a given molarity reactant required to produce a certain amount of product.

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)

A.) What volume of 3.00 M HCl in liters is needed to react completely (with nothing left over) with 0.750 L of 0.300 M Na2CO3?

Express your answer to three significant figures and include the appropriate units.

B.) A 377-mL sample of unknown HCl solution reacts completely with Na2CO3 to form 11.1 g CO2. What was the concentration of the HCl solution?

Express your answer to three significant figures and include the appropriate units.

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