Question

give a detailed explanation of how you can use the laboratory technique of titration to determine the concentration of a sodium hydroxide solution

Answer 1

Answer:

By titration with a standard acid solution and suitable indicator.

Explanation:

We can determine the concentration of a sodium hydroxide solution by titrating it against a standard HCl (or any strong acid) solution. In this method we can follow the given steps:

a) Fill the burette with naOH.

b) Take 10mL of a standard HCl solution in conical flask.

c) Add 2-3 drops of phenolphthalein as indicator in HCl.

d) start adding NaOH dropwise from burette to flask.

e) Note the end point as appearance of pink colour in the solution.

f) note the volume of NaOH added from burette.

g) use the following formula to calculate the concentration of NaOH solution

N₁V₁ = N₂V₂

Where

N₁= normality of NaOH

V₁= volume of NaOH used

N₂= normality of Hcl

V₂= 10 mL

Thus by putting values, we can determine the concentration of NaOH solution.

Answer 2

by titrating the NAOH solution with standard HCL solution using a pheophtheein indicator, end point will be found by change int he color of indicator