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 ...
夏季大考即將放榜。但是如果放榜后，對自己的成績不滿意，也不用就此擺爛，下半年的A-Level考試還可以選擇重考，通過參加秋季考試來刷新成績。 那么，重考對于申請是否有影響？重考有什么規則？接下來，帶大家來...
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...
Strong & Weak Acids & Bases Strong acids A?strong acid?is an acid that?dissociates?almost?completely?in aqueous solutions HCl (hydrochloric acid), HNO3?(nitric acid) and H2SO4?(sulfuric aci...
