Chemistry - 0620 CIE

Oxides

Bayani Gaba-gaba

Oxygen reacts with almost every element to form an oxide, but those oxides do not all behave the same way. Some turn water acidic, others make it alkaline, and a few can do either. Sorting oxides by how they react with acids and bases reveals a neat pattern that follows the periodic table.

In this lesson you will learn to classify oxides as acidic or basic and link this to whether the element is a metal or a non-metal. You will also meet amphoteric oxides, the in-between cases that react with both acids and bases, such as those of aluminium and zinc, and understand why they sit on that boundary.

Manufura

Classify oxides as acidic, including SO₂ and CO₂, or basic, including CuO and CaO, related to metallic and non-metallic character.
[Supplement] Describe amphoteric oxides as oxides that react with acids and with bases to produce a salt and water.
[Supplement] Classify Al O and ZnO as amphoteric oxides 2 3.

Takardar Darasi

Oxides are everywhere: in the air we breathe, the rust on iron, the lime spread on fields and the gases that cause acid rain. Knowing whether an oxide is acidic or basic tells you how it will react and what it can be used for, and it ties directly to where its element sits in the periodic table.

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Nazarin Darasi

Barka da kammala darasi akan Oxides. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

Which oxide is acidic? A. CaO B. CuO C. CO2 D. Na2O Answer: C
Which oxide is basic? A. SO2 B. CuO C. CO2 D. NO2 Answer: B
Which oxide is amphoteric? A. CaO B. SO2 C. Al2O3 D. CO2 Answer: C
An amphoteric oxide reacts with: A. Acids only B. Bases only C. Both acids and bases D. Neither acids nor bases Answer: C
Acidic oxides are generally oxides of: A. Metals B. Non-metals C. Noble gases D. Transition elements Answer: B