Question

A student titrated 20 ml of 0.410 m hcl with 0.320 m naoh. determine the volume of naoh needed at equivalence point

Answer 1

25.6mL NaOH

Step-by-step explanation:

We are given the Molarity of the solution (
`(moles)/(liters)`) and the volume of the solution (.02L).

By multiplying the two together, we can find the moles of solution that are reacted with HCl.

`moles = (.410 moles)/(L) *.02L`

This gives us .0082 moles of HCl.

We then find the moles of NaOH that are needed to react with the HCl using the equation.

`HCl + NaOH = NaCl + H_(2) O`

As HCl and NaCl have a 1:1 ratio, we need .0082 mol of NaOH.

Dividing this value by the Molarity of the solution

`(.0082mol)/(.320mol/L)`

Gives us the answer, in Liters (.0256), which we can then divide by 100 convert to mL.