Some materials are given below: Which is the anode of this cell?

Magnesium rod is the anode of this cell. In the reactivity series of metals Mg is placed on the top and Cu at the bottom of the series. Hence, magnesium is more reactive than copper. Hence, magnesium has the ability to donate electrons readily. The reaction taking place at the anode is given below. Mg → Mg 2 + + 2 e - The electrode at which oxidation occurs is called the anode.

Some materials are given below: Write the chemical equation fo the reaction taking place at the cathode.

The electrode at which the reduction takes place is called the cathode. In Mg electrode: Mg → Mg 2 + + 2 e - In Cu electrode : Cu 2 + + 2 e - → Cu

Some materials are given below: Write the chemical equation fo the reaction taking place at the cathode.

The electrode at which the reduction takes place is called the cathode. In Mg electrode: Mg → Mg 2 + + 2 e - In Cu electrode : Cu 2 + + 2 e - → Cu

Some materials are given below: Which is the anode of this cell?

Magnesium rod is the anode of this cell. In the reactivity series of metals Mg is placed on the top and Cu at the bottom of the series. Hence, magnesium is more reactive than copper. Hence, magnesium has the ability to donate electrons readily. The reaction taking place at the anode is given below. Mg → Mg 2 + + 2 e - The electrode at which oxidation occurs is called the anode.

Zinc piece and zinc powder are taken in two test tubes and equal amount of dil. HCl is added. (a) In which test tube does the reaction proceed faster? (b) Give reason. (c) Give an instance in daily life, where such condition is made use.

(a) The reaction in the test tube with zinc powder will proceed faster. (b) When solid reactants are made into smaller pieces or powder, they take up larger surface area. More reactant molecules come into contact and take part in collision thus increasing the number of effective collisions, as per the collision theory. Hence, the speed of the reaction also becomes faster. (c) We can take the instance of combustion of firewood. Large piece of firewood takes up a lot of time to burn slowly. However, when the firewood is cut into small pieces the burning takes place rapidly.

Consider the metals and solutions given in the box. Zn , Mg , Cu , Ag , CuSO 4 Solution , MgSO 4 Solution (a) Which of the above metals have to be selected to construct a Galvanic Cell? (b)Identify the anode and cathode of the cell. [Reactivity order Mg > Zn > Cu > Ag ] (c) Write the redox reaction taking place in the cell.

(a) Magnesium and copper have to be selected to construct a Galvanic Cell. (b) Anode from the MgSO 4 solution is Mg and Cathode from CuSO 4 solution is Cu . (c) The redox reaction taking place in the cell is, Mg + Cu 2 + → Mg 2 + + Cu