If the molarconcentration of sodium carbonate (Na2CO3) is 2.5 mM (millimolar),what is the mass concentration of Na2CO3 (in mg/L)? For the samemolar concentration, what is the mass concentration ofNa+?

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Collen VonLv2

28 Sep 2019

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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) + Na₂CO_3(aq) → 2NaCl_(aq) + H₂O_(l) + CO_2(g)

1) What volume of 1.50 M HCl in liters is needed to react completely (with nothing left) with 0.500 L of 0.200 M Na₂CO₃? Express your answer numerically in liters.

2) A 581-mL sample of unknown HCl solution reacts completely with Na₂CO₃ to form 15.1 g CO₂. What was the concentration of the HCl solution? Express the molar concentration numerically.

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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) + Na₂CO_3(aq) ⇌ 2NaCl_(aq) + H₂O_(l) + CO_2(g)

1) What volume of 1.50 M HCl in liters is needed to react completely (with nothing left over) with 0.500 L of 0.200 M Na₂CO₃? Express your answer numerically in liters.

2) A 581-mL sample of unknown HCl solution reacts completely with Na₂CO₃ to form 15.1 g CO₂. What was the concentration of the HCl solution? Express the molar concentration numerically.