Electrolysis
Muhtasari
Pass an electric current through a molten salt and something remarkable happens: the compound splits apart, with a metal appearing at one electrode and a non-metal at the other. This is electrolysis, the use of electricity to break down a compound that no simple chemical reaction could.
In this lesson you will learn what electrolysis is, the meaning of the key terms electrolyte, electrode, cathode and anode, and how a molten ionic compound is decomposed. Molten lead(II) bromide is the worked example.
Malengo
- [Core] Define electrolysis as the decomposition of an ionic compound, when molten or in aqueous solution, by the passage of an electric current
- [Core] Identify in simple electrolytic cells: (a) the anode as the positive electrode (b) the cathode as the negative electrode (c) the electrolyte as the molten or aqueous substance that undergoes electrolysis
- [Core] Identify the products formed at the electrodes and describe the observations, made during the electrolysis of: (a) molten lead(II) bromide (b) concentrated aqueous sodium chloride (c) dilute sulfuric acid using inert electrodes made of platinum or carbon / graphite
- [Supplement] State that metals or hydrogen are formed at the cathode and that non-metals (other than hydrogen) are formed at the anode
- [Supplement] Predict the identity of the products at each electrode for the electrolysis of a binary compound in the molten state
Maelezo ya Somo
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Electrolysis. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Electrolysis is the breakdown of an ionic compound by: A. Heating alone B. Passing an electric current through it C. Adding water D. Adding an acid Answer: B
- An electrolyte conducts electricity when it is: A. Solid B. Molten or dissolved C. Frozen D. Pure and dry Answer: B
- The cathode in an electrolysis cell is: A. Positive and attracts positive ions B. Negative and attracts positive ions C. Negative and attracts negative ions D. Positive and attracts negative ions Answer: B
- During the electrolysis of molten lead(II) bromide, the product at the cathode is: A. Bromine B. Lead C. Oxygen D. Hydrogen Answer: B
- Inert electrodes are often made of: A. Sodium B. Carbon or platinum C. Iron D. Lead Answer: B
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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Electrolysis? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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