Question

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 2.50 M HCl in liters is needed to react completely (with nothing left over) with 0.250 L of 0.300 M Na₂CO₃?

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

b.A 317-mL sample of unknown HCl solution reacts completely with Na₂CO₃ to form 13.1 g CO₂. What was the concentration of the HCl solution?

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

Answer 1

there was a slight calculation error in the previous answer. i have corrected and uploaded it again. please check it! thanks

2Ha (aq) + Na₂ coz (aq 2 Naul (aq) + 40(L) + colg). 2 moles of Hu neact to 1 mol of Ng L03 moles of Ha moles of Naw3 moles of HU 0.250 X 0.300 moles 0.250730 dles. 0.500 X 0.300 2X 0.2500 -300 E woles Of HU -0.150moles. (Cona) (Volume) - no. of moles 250 x V = 0.150 oboot 0.060 L 50 Where Vis the vowme of Hu needed 2 moles of Ha react to form I not of co2 moles of HU = moles of co2 moles of HU = 2*13.) moles. 44 moles of HU 0.595 moles. Let. C be the concentration Of umknown Hu. (c)(317)) - 0-595 Llooo) C (0.317) = 0.595 C= 1.87 M.