The unknown concentration of NaOH was determined by titration with HCl. The following data was collected:

mL NaOH = 34.8 mL
mL of HCl used = 29.6 mL
concentration of HCl = 0.19 M

What is the concentration of the NaOH?





A titration was performed in a lab situation. H2SO4 was titrated with NaOH. The following data was collected:

mL of NaOH used = 43.2 mL
concentration NaOH = 0.15 M
mL H2SO4 = 20.5 mL
Notice that H2SO4 releases 2 H+ per mole. What is the concentration of H2SO4?

M

mL NaOH = 34.8 mL
mL of HCl used = 29.6 mL
concentration of HCl = 0.19 M

What is the concentration of the NaOH?


Steps:
1. Write down the chemical equation.
2. Calculate the number of moles of HCl that was used.
3. If 1 mole of HCl does not react with 1 mole of NaOH, multiply or divide the number of moles of HCl by a factor. You now have the number of moles of NaOH in the sample.
4. The sample was 34.8 mL. If you divide moles (the number of moles of NaOH) by the volume of the sample, you will have the concentration of NaOH. You may have to adjust the units since most concentrations are measured in moles per liter.



mL of NaOH used = 43.2 mL
concentration NaOH = 0.15 M
mL H2SO4 = 20.5 mL
Notice that H2SO4 releases 2 H+ per mole. What is the concentration of H2SO4?


The steps are exactly the same as the first problem.