Two test tubes, A and B, both contain a sodium salt solution. After a small amount ofbarium chloride is added, the solution in both test tubes forms a white precipitate. 9.1 Write down the type of reaction that takes place in the test tubes. (1) 9.2 A concentrated nitric acid solution is then added into … Read more
The electrolytic cell below is set up to obtain pure copper from a piece of impure copper. The impure copper contains other metals, such as platinum, iron, cobalt, silver and nickel. The cell potential of the power source is adjusted so that only copper is deposited on electrode B. 9.1 Define an electrolytic cell. (2) … Read more
The simplified diagram below represents an electrolytic cell used to electroplate acopper (Cu) coin with silver (Ag). 9.1 Define the term electrolysis. (2) 9.2 Which component in the diagram indicates that this is an electrolytic cell? (1) 9.3 Write down the NAME or FORMULA of the electrolyte. (1) 9.4 How will the concentration of the … Read more