A sample of 1.0g of solid Fe_(2)O_(3) of 80% purity is dissolved in a moderately concentrated HCl solution which is reduced by zinc dust. The resulting solution required 16.7mL of a 0.1M solution of the oxidant. Calculate the number of electrons taken up by the oxidant.
4L of 0.02 M aqueous solution of NaCI was diluted by adding one litre of water. The molality of the resultant solution is ________
A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass. Calculate the mass percentage of the resulting solution.
Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1M is 100 Omega . The conductivity of this solution is 1.29Sm^-1 . Resitance of the same cell when filled with 0.2 M of the same solution is 520Omega . The molar conductivity of 0.2 M solution of the electrolyte will be
2.5 litre of 1 M NaOH solution are mixed and another 3 litre of 0.5 M NaOH solution. Then the molarity of the resulting solution is
An aqueous solution of 0.5 g of NaOH is dissolved in 500 cm^3 of the solution. The molarity of the solution will be :
Which is used for ending charge on colloidal solution
(a) Predict the products of electrolysis of the following: (i) An aqueous solution of AgNO_(3) with silver electrodes. (ii) An aqueous solution of AgNO_(3) with platinum electrodes. (iii) A dilute aqueous solution of H_(2)SO_(4) with platinum electrodes.
A solution of CuSO_4 is electrolysed for 10 minutes with a current of 1.5 amperes. What is the mass of copper deposited at the cathode?
An aqueous solution of Na_2SO_4 is electrolysed using Pt electrodes. The products at the cathode and anode are respectively:
