Answer:
1 M
Explanation:
Step 1:
Data obtained from the question. This includes the following:
Volume of base (Vb) = 100mL
Volume of ac(Va) = 20mL
Molarity of acid (Ma) = 5M
Molarity of base (Mb) =...?
Step 2:
The balanced equation for the reaction. This is given below:
HCl + NaOH —> NaCl + H2O
From the above equation, the following were obtained:
Mole ratio of the acid (nA) = 1
Mole ratio of the base (nB) = 1
Step 3:
Determination of the molarity of the base.
The molarity of the base can be obtained as follow:
MaVa/MbVb = nA/nB
5 x 20 / Mb x 100 = 1
Cross multiply to express in linear form
Mb x 100 = 5 x 20
Divide both side by 100
Mb = (5 x 20)/100
Mb = 1 M
Therefore, the molarity of the base is 1 M
