A 25 mL solution of .5M NaOH is titrated until neutralization into a 50mL sample of HCl. What was the concentration of HCl?
mLNaOH x MNaOH = mLHCl x MHCl
Hpta marica yo queria la anser
To find the concentration of HCl, you can use the principle of stoichiometry and the balanced chemical equation for the reaction between NaOH and HCl:
NaOH + HCl -> NaCl + H2O
Let's calculate the number of moles of NaOH used in the titration:
moles of NaOH = volume of NaOH solution (in L) x molarity of NaOH
= 0.025 L x 0.5 mol/L
= 0.0125 mol
Since the balanced chemical equation shows a 1:1 ratio between NaOH and HCl, the moles of NaOH used will be equal to the moles of HCl present in the 50 mL HCl sample.
moles of HCl = moles of NaOH
= 0.0125 mol
Now, let's calculate the concentration of HCl:
concentration of HCl = moles of HCl / volume of HCl solution (in L)
= 0.0125 mol / 0.05 L
= 0.25 mol/L
Therefore, the concentration of HCl is 0.25 M.
To determine the concentration of HCl, we can use the concept of stoichiometry and the balanced chemical equation for the neutralization reaction between NaOH and HCl.
The balanced equation for the reaction is:
NaOH + HCl -> NaCl + H2O
From the balanced equation, we can see that the mole ratio between NaOH and HCl is 1:1. This means that for every mole of NaOH, there is one mole of HCl.
Given that the NaOH solution has a concentration of 0.5M and a volume of 25 mL, we can calculate the number of moles of NaOH using the formula:
moles = concentration × volume
moles of NaOH = 0.5M × 0.025L = 0.0125 moles
Since the mole ratio between NaOH and HCl is 1:1, the number of moles of HCl present in the solution is also 0.0125 moles.
Now, let's calculate the concentration of HCl by dividing the number of moles of HCl by the volume of the HCl solution:
concentration of HCl = moles of HCl / volume of HCl solution
The volume of the HCl solution is given as 50 mL, so we need to convert it to liters:
volume of HCl solution = 50 mL = 0.05 L
concentration of HCl = 0.0125 moles / 0.05 L = 0.25 M
Therefore, the concentration of HCl in the 50 mL sample is 0.25 M.