Naming Transition Metal Compounds Transition metals are characterized by having variable oxidation numbers. Oxidation numbers can be used in the names of compounds to indicate which oxidation numbe...
Oxidizing & Reducing Agents Oxidising agent An oxidising agent is a substance that oxidises another atom or ion by causing it to lose electrons An oxidising agent itself gets reduced – gains el...
Deducing Oxidation Numbers The oxidation numbers of all other atoms in their compounds can vary By following the oxidation number rules, the oxidation number of any atom in a compound or ion can be...
Oxidation & Reduction There are three definitions of oxidation and reduction used in different branches of chemistry Oxidation and reduction can be used to describe any of the following proces...
Reducing Sulfur Oxide Emissions The removal of sulfur from fossil fuels can either take place pre-combustion or post-combustion The oxides of sulfur, SO2 and SO3, are both acidic and toxic gases S...
Effects of acid deposition Effect on materials Acid deposition can react with metals and rocks (such as limestone) causing buildings and statues to get damaged The impact of acid deposition can be ...
夏季大考即将放榜。但是如果放榜后，对自己的成绩不满意，也不用就此摆烂，下半年的A-Level考试还可以选择重考，通过参加秋季考试来刷新成绩。 那么，重考对于申请是否有影响？重考有什么规则？接下来，带大家来...
Acid Deposition What is acid deposition? Rain is naturally acidic because of dissolved CO2 which forms carbonic acid H2O (l) + CO2 (g) ⇌ H2CO3 (aq) Carbonic acid is a weak acid and dissociates in...
Comparing Strong & Weak Acids Strong and weak acids can be distinguished from each other by their: pH value (using a pH meter or universal indicator) Electrical conductivity Reactivity pH value...
