Answer :
The molar concentration of HCL is 0.02333 M.
What is molar concentration?
The best approach to describe a solute concentration in a solution is in terms of molar concentration. Molarity is defined as the total number of moles of solute dissolved in one liter of solution, or M = mol/L.
What is mole?
A "mole" is the volume of a system with as many elementary particles as there are atoms in 0.012 kilos of carbon 12.
Volume of HCl solution : 50.00 mL = 0.050 L
molarity of Ba(OH)2 == 0.01963 M
reaction : Ba(OH)2 (aq) + 2 HCl(aq) ===> BaCl2 (aq) + 2 H2O (l)
moles of Ba(OH)2 consumed == 0.01963 mol/L * 0.02971 L = 0.0005832 moles
1 mole of Ba(OH)2 reacts 2 moles of HCl ====> thus moles of HCl present : 0.0011664 moles
Molarity HCl == 0.0011664 moles/0.050 L = 0.02333 M
Therefore, the molar concentration of HCL is 0.02333 M.
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