Electrochemistry — IGCSE Sciences - Co-Ordinated (0654) questions by topic
Predicting electrolysis products at each electrode for solutions such as copper chloride and magnesium sulfate, writing the ionic equation for hydrogen gas formation in a toy car's fuel cell, completing a sentence defining electrolysis, and naming the anode product from molten lead bromide underpin the 7 electrochemistry questions from 2023 and 2024, worth 7 to 12 marks.
Explain, construct and state are the leading command words, with complete and describe used for definitions and observations. Because predicting the correct product at each electrode depends on knowing which ion is discharged, work through the electrolysis-prediction questions here and submit for instant marking, so a wrong product at either electrode is corrected before the same reasoning error appears in a later question.
May–June 2024, Paper 41
Electrolysis is the breakdown of an ionic compound by the passage of electricity. Complete the following sentences about the products of electrolysis. Choose words from the list:…
Answer this question and get it marked →May–June 2024, Paper 43
Fig. 8.1 shows a toy car that is powered by hydrogen gas. The hydrogen gas is made by the electrolysis of water. During the electrolysis, hydrogen ions, H+, gain electrons.…
Answer this question and get it marked →October–November 2024, Paper 41
Aluminium is extracted by electrolysis from the ore bauxite that contains aluminium oxide, Al2O3. The equation for the overall reaction is: 2Al2O3(l) - 4Al(l) + 3O2(g). A…
Answer this question and get it marked →October–November 2024, Paper 42
Complete the sentence about electrolysis: Electrolysis is the breakdown of an ... compound when ... or in aqueous solution by the passage of electricity.
Answer this question and get it marked →May–June 2023, Paper 42
Electrolysis is the breakdown of an ionic compound (molten or aqueous) by electricity. Table 11.1 shows products of electrolysis of aqueous solutions using inert electrodes…
Answer this question and get it marked →October–November 2023, Paper 41
Molten lead(II) bromide conducts electricity. When molten lead(II) bromide is electrolysed, lead is made at the cathode. State the product at the anode.
Answer this question and get it marked →October–November 2023, Paper 43
Electrolysis is used to break down ionic compounds. Complete the sentences about electrolysis. Choose words from the list. Each word may be used once, more than once, or not at…
Answer this question and get it marked →Other IGCSE Sciences - Co-Ordinated topics
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