Question

Сколько из перечисленных веществ: Ag, H2SO4, CaO, Cu (OH)2 - реагирует с оксидом алюминия? 1) одно 2)два 3)три 4)четыре Не могли бы вы объяснить свой ответ, пожалуйста. Даю 10 баллов.

Answer 1

Оксид алюминия амфотерный то есть с кислотами, кислотными оксидами он реагирует как щелочь а с основными оксидами и основами как кислота правильный ответ три

Answer 2

Reactions with Aluminum Oxide

The number of substances that react with aluminum oxide can be determined by examining the chemical properties of each substance.

Ag (Silver): Silver does not react with aluminum oxide under normal conditions. Therefore, Ag does not react with aluminum oxide.

H2SO4 (Sulfuric Acid): Sulfuric acid can react with aluminum oxide to form aluminum sulfate and water. The balanced chemical equation for this reaction is:

H2SO4 + Al2O3 → Al2(SO4)3 + H2O

Therefore, H2SO4 reacts with aluminum oxide.

CaO (Calcium Oxide): Calcium oxide can react with aluminum oxide to form a compound known as calcium aluminate. The balanced chemical equation for this reaction is:

CaO + Al2O3 → CaAl2O4

Therefore, CaO reacts with aluminum oxide.

Cu(OH)2 (Copper Hydroxide): Copper hydroxide does not react with aluminum oxide under normal conditions. Therefore, Cu(OH)2 does not react with aluminum oxide.

Based on the chemical properties of the substances, two out of the four listed substances (H2SO4 and CaO) react with aluminum oxide.