Redox
Muhtasari
When iron rusts, when a fuel burns, when a battery drives your phone, the same hidden bargain is taking place: one substance loses something and another gains it. That bargain is a redox reaction, the simultaneous oxidation and reduction that powers an enormous slice of chemistry, biology and industry.
In this lesson you will learn redox three ways: as the gain and loss of oxygen, as the transfer of electrons, and as a change in oxidation number. You will assign oxidation numbers with Roman numerals, spot oxidising and reducing agents, and read the tell-tale colour changes that prove a redox reaction has happened.
Malengo
- Use a Roman numeral to indicate the oxidation number of an element in a compound.
- Define redox reactions as involving simultaneous oxidation and reduction.
- Define oxidation as gain of oxygen and reduction as loss of oxygen.
- Identify redox reactions as reactions involving gain and loss of oxygen.
- Identify oxidation and reduction in redox reactions.
- [Supplement] Define oxidation in terms of: (a) loss of electrons (b) an increase in oxidation number.
- [Supplement] Define reduction in terms of: (a) gain of electrons (b) a decrease in oxidation number.
- [Supplement] Identify redox reactions as reactions involving gain and loss of electrons.
- [Supplement] Identify redox reactions by changes in oxidation number using: (a) the oxidation number of elements in their uncombined state is zero (b) the oxidation number of a monatomic ion is the same as the charge on the ion (c) the sum of the oxidation numbers in a compound is zero (d) the sum of the oxidation numbers in an ion is equal to the charge on the ion.
- [Supplement] Identify redox reactions by the colour changes involved when using acidified aqueous potassium manganate(VII) or aqueous potassium iodide.
- [Supplement] Define an oxidising agent as a substance that oxidises another substance and is itself reduced.
- [Supplement] Define a reducing agent as a substance that reduces another substance and is itself oxidised.
- [Supplement] Identify oxidising agents and reducing agents in redox reactions.
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Redox. 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.
- Which statement defines oxidation in terms of electrons? A. Gain of electrons B. Loss of electrons C. Gain of protons D. Loss of neutrons Answer: B
- What is the oxidation number of an element in its uncombined state? A. +1 B. -1 C. 0 D. equal to its group number Answer: C
- In the reaction CuO + H2 -> Cu + H2O, the reducing agent is: A. CuO B. H2 C. Cu D. H2O Answer: B
- An oxidising agent is a substance that: A. is itself oxidised B. oxidises another substance and is itself reduced C. loses oxygen only D. gains electrons from no other species Answer: B
- When iodide ions turn acidified potassium iodide from colourless to yellow-brown, the iodide ions are: A. reduced B. oxidised C. unchanged D. acting as an oxidising agent Answer: B
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
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 Redox? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
Pakua Programu Kwenye Google Playstore
Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.
