Question

Part A

What volume of 1.00 M HCl in liters is needed to react completely (with nothing left over) with 0.250 L of 0.500 M Na2CO3?

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

Part B

A 419-mL sample of unknown HCl solution reacts completely with Na2CO3 to form 12.1 g CO2. What was the concentration of the HCl solution? Express your answer to three significant figures and include the appropriate units.

A Review Constants Periodic Table Part A 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. What volume of 1.00 MHCl in liters is needed to react completely (with nothing left over) with 0.250 L of 0.500 M Na2CO3? Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) "! Ä m o oi ? Value Units Submit

Answer 1

Parta) Na, co3 + 2Hd z Nad + H₂O + CO₂ n . 1.00 X V2 0.500 X 0.250 1 2 v2 = 0.250 volume = 0.250 L 1 pante) Nad + H2O + CO2 Na2CO3 + 2 Hel 12-) = 0.275 Moly of 6 = 44 Moly of Hc = 2X 0.275= 0.55 Molarity of Hel = 0.55 0.419 = 1.31 M concentration = 1. 31MI