Download detailed notes for 10th Class Chemistry Chapter 16 (Electrochemistry). Covers all SLOs, oxidation states, electrolysis rules, half-equations, and Daniel Cell diagrams.
Student Learning Outcomes
After studying this chapter, students will be able to:
16
Electrochemistry
Define redox reactions as simultaneous oxidation and reduction in terms of oxygen, hydrogen,
electrons and changes in oxidation state
Use roman numerals to indicate oxidation number of an element in a compound
Identify oxidizing and reducing agents in a redox reaction
Recognize that the oxidation number of elements in their free state is zero
Derive the formula of ionic compounds from ionic charges and oxidation numbers
Identify that the oxidation number of a monatomic ion is the same as the charge on the ion
Explain that the sum of the oxidation numbers in a neutral compound is zero
Explain that the sum of the oxidation numbers in an ion is equal to the charge on the ion
Identify redox reactions by the colour changes involved when using acidified aqueous potassium
manganate (VII) to (II) or aqueous potassium iodide
Define electrolysis as decomposition of ionic compound, in molten or aqueous solution, by passage
of electric current
Identify and label in simple electrolytic cells, the anode (+), cathode (-), electrolyte and direction of
flow of electrons in external circuit,
Describe the transfer of charge in external circuit, movement of ions in the electrolyte and transfer of
electrons at electrodes
Identify the products formed at electrodes and describe the observations made during the
electrolysis of molten lead (II) chloride, concentrated dilute sulfuric acid using inert electrodes
(platinum or carbon/graphite)
State that hydrogen- oxygen fuel cell uses hydrogen and oxygen to produce electricity with water as
the only chemical product
Describe the advantages and disadvantages of using hydrogen-oxygen fuel cells in comparison with
gasoline /petrol engines in vehicles.
Define corrosion and discuss methods to prevent it. (some examples may include barrier method
such as using paint, galvanizing, electroplating; sacrificial protection such as using magnesium
blocks in ships)
Identify the products formed at electrodes and describe the observations made during the
electrolysis of dilute copper (II) sulphate using inert electrode or copper electrode
Predict the identity of products of electrolysis of a halide compound in dilute or concentrated
solution
Construct ionic half- equations for reaction at either electrode.
Describe electroplating and its applications.
Sketch a schematic diagram for a voltaic cell e.g., Daniel cell
Use the voltage data given for voltaic cells to determine order of reactivity of any two metals