A student was given the following substances and was asked to show types of chemical reactions through experiment. Write how he would have done that.
Copper sulphate solution, barium chloride solution, ferrous sulphate crystals, Iron nails, calcium oxide, water.

Explain the following chemical changes : An iron nail is dropped in a beaker containing acidified copper sulphate solution.

Write the following chemical reaction including the physical states of the substances and balance the chemical equation. Barium chloride reacts with liquid sodium sulphate to leave barium sulphate as precipitate and also form liquid sodium chloride

Write the balanced equation for the following chemical reactions. (i) Hydrogen + Chlorine to Hydrogen chloride (ii) Barium chloride + Aluminium sulphate to Barium sulphate + Aluminium chloride (iii) Sodium + Water to Sodium hydroxide + Hydrogen

What would you observe when zinc is added to a solution of iron(II) sulphate? Write the chemical reaction that takes place.

The iron nail dipped in Copper Sulphate solution becomes brown and the blue colour of the Copper Sulphate solution fades. Which type of reaction is this ?

Draw a diagram of the activity you perform to observe the reaction between an iron nail and copper sulphate solution. Is it a physical // Chemical change?

Write a balanced chemical equation with state symbols for the following reactions. (i) Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride. (ii) Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.

Balance the chemical equation by including the physical states of the substances for the following reactions. a) Barium chloride and sodium sulphate aqueous solutions react to give insoluble barium sulphate and aqueous solution of sodium chloride.

a) If we dip the iron nail in the solution of copper sulphate, what changes can you observed? b) Write the chemical equation. c) What type of reaction it is?

Electrolysis is the process in which electrical energy is converted to chemical energy. In electrolyte cell, oxidation takes place at anode and reduction at cathode. Electrode process depends on the electrode taken for electrolysis. Amount of substance liberated at an electrode is directly proportionation to the amount of charge passed through it. The mass of substance liberated at electrode is calculate using the following realation : m=(itE)/(96500) Here, E represent the equivalent mass and 96500 C is called the faraday constant. Faraday (96500 C) is the charge of 1 mole electron i.e., 6.023 xx 10^(23) electrons, it is used to liberate on gram equivalent of the substance. The platinum electrodes were immersed in a solution of cupric sulphate (CuSO_4) and electric current is passed through the solution. After sometimes, it was observed that the colour of copper sulphate disappeared with evolution of a gas at the electrode. The colourless solution contains.