1.

In amixure of NaOH and NaCl 50% sodium is present. Calculate mass % of NaOH in the solution.

Answer»

`95.2%`
0.5875
0.1567
0.227

Solution :In 100gm MIXTURE contain `W_(Na)=50GM`
`n_(NAOH)=a, n_(NaCl)=b`
40a+58.5b=100 . . . .(i)
`axx23+bxx23=50gm`
`a+b=(50)/(23)` . . . .(ii) `40a+40b=(50xx40)/(23)`
40a+58.5b=100
`18.5b=100-(200)/(23)`
`b=(100-86.9)/(18.5)=0.7`.
`a=(50)/(23)-0.7=2.17-0.7`
In 100 gm mixture `rArr W_(NaOH)=58.8rArr58.8%` APPROX.


Discussion

No Comment Found

Related InterviewSolutions