Chemical Reaction Stoichiometry: Calculating Original Concentration of HCl Solution
What was the original concentration of the HCl solution?
The balanced chemical reaction is expressed as:
HCl + NaOH ---> NaCl + H2O
We are given the amount and the concentration of the sodium hydroxide reactant. This will be the starting point for the calculations.
Answer : The original concentration of HCl is 0.04 M
Explanation:
HCl + NaOH → NaCl + H2O
According to the neutralization law,
M1V1=M2V2
where,
M1 = molarity of NaOH solution = 0.100 M
V1 = volume of NaOH solution = 60.0 ml
M2 = molarity of HCl solution = ?
V2 = volume of HCl solution = 150 ml
Now put all the given values in the above law, we get the molarity of HCl solution.
(0.100M) × 60ml = (M2) × (150ml)
M2 = 0.04M
Therefore, the original concentration of HCl is 0.04 M