1.575 g of an organic acid was dissolved...

1.575 g of an organic acid was dissolved in 250 mL of water. 20 mL of this solution required 16 mL of N/8 alkali solution for complete neutralisation. If the basicity of the acid is two, find its molecular mass.

182

136

126

148

Text Solution

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The correct Answer is:

16mL N/8 alkali solution `-=` 20 mL of acid solution
2mL 1 N alkali solution `-=` 20 mL of acid solution
`(2xx250)/(20)mL` 1 N alkali solution `-=` 250 mL of acid solution.
25 mL 1 N alkali solution `-=` 1.575 g acid
1000 mL 1 N alkali solution `-=(1.575)/(25)xx1000g` acid
Eq. mass of the acid = 63 g acid, Molecular mass of the acid = `63xx2=126`

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