NaOH and Na_(2)CO_(3) are dissolved in 200ml aqueous solution. Now methyl orange is added in the same solution titrated and requires 2.5ml of the same HCl. Calculate the normality of NaOH & NaCO_(3).

NaOH and Na_(2)CO_(3) are dissolved in 200ml aqueous solution. Now met

1.	NaOH and Na_(2)CO_(3) are dissolved in 200ml aqueous solution. Now methyl orange is added in the same solution titrated and requires 2.5ml of the same HCl. Calculate the normality of NaOH & NaCO_(3).
Answer» `(0.5)/(200),(1.5)/(200)` `(1.5)/(200),(0.5)/(200)` `(0.5)/(200).(0.5)/(200)` `(1.5)/(200),(1.5)/(200)` Solution :Let M moles of NaOH = a, `Na_(2)CO_(3)=B` With phenolphthalein, `eq_(HCl)` = `eq_(NaOH)+(1)/(2)eqNa_(2)CO_(3)` `17.5xx0.1=axx1+bxx1` With methyl organe, `eq_(HCl)=(1)/(2)eqNa_(2)CO_(3)` `2.5xx0.1=bxx1` `implies a=1.5,b=0.25` implies `[NaOH]=(1.5)/(200)M=(1.5)/(200)N` `[Na_(2)CO_(3)]=(0.25)/(200)M=(0.5)/(200)N`