The mixed alkali solution used for analysis should be about 0.5mol/dm³ in sodium hydroxide and...

The mixed alkali solution used for analysis should be about 0.5mol/dm³ in sodium hydroxide and 0.25mol/m³ in sodium carbonate.
1. Pipette 25.0cm³ of the mixed alkali solution into a 250cm³ graduated flask, make to the mark with pure water, and mix thoroughly.
2.pipette 25.0cm³ of this diluted solution into 250cm³ conical flask, add 3-4 drop of phenolphthalein indicator, and titrate with standard 0.100moldm³ hydrochloric acid until the pink colour is just discharged. Note the volume required.
3.Add to the same mixture 3-4 drops of methyl orange indicator and continue titration until the methyl orange changes from yellow to red.
4.repeat to give three consistent sets of titres.?

In Chemistry
3 Answers Available
Asked by Hazzan on 15th June, 2022