Answer:
0.383M
Explanation:
The following data were obtained from the question:
Volume of acid, HCl (Va) = 10mL
Molarity of acid, HCl (Ma) =...?
Molarity of base, NaOH (Mb) = 0.290 M
Volume of base, NaOH (Vb) = 13.2mL
Next, we shall write the balanced equation for the reaction. This is given below:
HCl + NaOH —> NaCl + H2O
From the balanced equation above,
The mole ratio of the acid (nA) = 1
The mole ratio of the base (nB) = 1
Finally, we shall determine the concentration of the acid, HCl solution as follow:
MaVa/MbVb = nA/nB
Ma x 10 / 0.29 x 13.2 = 1
Cross multiply
Ma x 10 = 0.29 x 13.2 x 1
Divide both side by 10
Ma = (0.29 x 13.2 x 1) /10
Ma = 0.383M
Therefore, the concentration of the acid, HCl is 0.383M.