Question

a mixture containing sodium carbonate sodium hydroxide and dinner matter with 0.75 ram when the aqua solution is titrated with 0.5 normality of hcl the colour of phenolphthalein disappear when 21 ml of acid has been added methyl orange is then added and 7ml both the of the acid is required to give the rate dollar today service centre percentage of sodium carbonate is​

Answer 1

Explanation:

Let Meq of NaOH=x and Meq of Na

2

CO

3

=y

Meq of NaOH+

2

1

Meq Na

2

CO

3

=Meq HCl

x+

2

y

=0.5×21=10.5 ----- (1)

2

MeqNa

2

CO

3

= Meq HCl

2

y

=0.5×7

⟹y=7

Now

2

106

Na

2

CO

3

×1000=y

Na

2

CO

3

=0.371

Answer 2

Answer:

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