1.26 g of a dibasic acid were dissolved in water and the solution made up to 200 mL. 20 mL of this solution were completely neutralised by 10 mL of `N/5` NaOH solution. Calculate the equivalent mass and molecular mass of the acid.

A sample of sodium carbonate contains impurity of sodium sulphate. 1.25 g of this sample are dissolved in water and volume made up to 250 mL. 25 mL of this solution neutralise 20 mL of N/10 sulphuric acid. Calculate the percentage of sodium carbonate in the sample.

0.84 g of a acid (mol wt. 150) was dissolved in water and the volume was made up to 100 ml. 25 ml of this solution required 28 ml of (N/10) NaOH solution for neutralisation. The equivalent weight and basicity of the acid

7.5 g of an acid are dissolved per litre of the solution. 20 mL of this acid solution required 25 mL of N//15 NaOH solution for complete neutralization. Calculate the equivalent mass of the acid.

1.325 g of anhydrous sodium carbonate are dissolved in water and the solution made up to 250 mL. On titration, 25 mL of this solution neutralise 20 mL of a solution of sulphuric acid. How much water should be added to 450 mL of this acid solution to make it exactly N/12 ?

2.65gm of a diacidic base was dissolved in 500 ml of water. Twenty millilitres of this solution required 12 ml of (N)/(6) HCl solution. Calculate the equivalent mass and molucular mass of the base.

1.575 g of oxalic acid (COOH)_(2).xH_(2)O are dissolved in water and the volume made up to 250 mL. On titration 16.68 mL of this solution requires 25 mL of N/15 NaOH solution for complete neutralisation. Calculate the value of x.

4.0 g of a mixture of Nacl and Na_(2) CO_(3) was dissolved in water and volume made up to 250 mL . 25 mL of this solution required 50 mL of N//10 HCl for complete neutralisation. Calculate the percentage composition of the original mixture.

1.26 g of hydrated oxalic acid was dissolved in water to prepare 250 ml of solution. Calculate molarity of solution

0.7 g " of " Na_(2)CO_(3).xH_(2)O were dissolved in water and the volume was made to 100 mL, 20 mL of this solution required 19.8 mL " of " N//10 HCl for complete neutralization. The value of x is:

10.875 g of a mixture of NaCI and Na_2CO_3 was dissolved in water and the volume was made up to 250 mL. 20.0 mL of this solution required 75.5 mL of N/10 H_2SO_4 . Find out the percentage composition of the mixture.