0.16g of `N_2H_4` are dissolved in water and the total volume made upto 500ml. Calculate the percentage of `N_2H_4` that has reacted with water in this solution. The `K_b` for `N_2H_4` is `4xx10^-6` M

0561g of KOH is dissolved in water to give 200mL of solution at 298 K. Calculate the concentrations of K^+, H^+ and OH^- ions. What is its pH '?

1.44g pure FeC_2O_4 was dissolved in dil. H_2SO_4 and solution diluted to 100 ml. Calculate volume of 0.01 M KMnO_4 required to oxidise FeC_2O_4 solution completely.

9.8 g of H_2SO_4 is present in 500 mL of the solution. Calculate the pH of the solution.

1.575 g of oxalic acid (COOH)_2. xH_2O are dissolved in water and the volume made upto 250 mL. On titration 16.68 mL of this solution requires 25 mL of N/15 NaOH solution for complete neutralization. Calculate x.

Calculate the pH of 0.05 (M) H_(2) SO_(4) solution .

Calculate the amount of H_(2)O_(2) present is 600 mL of 10 volume H_(2)O_(2) solution.

Calculate the volume of H_(2) gas (at STP) liberated by the reaction of exces Zn with 500 mL 0.5(N) H_(2)SO_(4) .

1.325 g of anhydrous sodium carbonate is dissolved in water and the solution is made up to 250 mL. On titration 25 mL of this solution neutralises 20 mL of a solution of H_2SO_4 . HOW much water should be added to 450 mL of this acid solution to make it exactly N/12 ?

0.63 g of dibasic acid was dissolved in water. The volume of the solution was made 100 mL. 20 mL of this acid solution required 10 mL N/5 NaOH solution. What is the normality of acid.