Question

8. Визначте тип хімічних реакцій: a) Ca(OH)2 + 2HCl = CaCl2 + 2H,0; в) Fe + AgNO3 = Fe(NO3)2 + 2Ag; б) К,0 + H20 – 2KOH; г) 2Fe(OH)3 = Fe,03 + 3H,0. 9. Який елемент є відновником у реакції 2H,S + 30, = 250, + 2H,0 ?​

Answer 1

Ответ:

8. а) р. обміну

в) р. заміщення

б) р. сполучення

Г) р. розкладу

Answer 2

Types of Chemical Reactions:

a) The reaction between Ca(OH)2 and 2HCl can be classified as a neutralization reaction. In this reaction, an acid (HCl) reacts with a base (Ca(OH)2) to form a salt (CaCl2) and water (H2O) [[1]].

b) The reaction between Fe and AgNO3 can be classified as a single displacement reaction or a redox reaction. In this reaction, iron (Fe) displaces silver (Ag) from silver nitrate (AgNO3) to form iron(II) nitrate (Fe(NO3)2) and silver (Ag) [[2]].

c) The reaction between K and H2O can be classified as a displacement reaction or a redox reaction. In this reaction, potassium (K) displaces hydrogen (H) from water (H2O) to form potassium hydroxide (KOH) and hydrogen gas (H2) [[3]].

d) The reaction between 2Fe(OH)3 can be classified as a decomposition reaction. In this reaction, iron(III) hydroxide (Fe(OH)3) decomposes to form iron(III) oxide (Fe2O3) and water (H2O) [[4]].

Element as a Reducing Agent:

In the reaction 2H2S + 3O2 → 2SO2 + 2H2O, the element Sulfur (S) acts as the reducing agent. A reducing agent is a substance that donates electrons and gets oxidized in a redox reaction. In this reaction, sulfur (S) is oxidized from an oxidation state of -2 in hydrogen sulfide (H2S) to an oxidation state of +4 in sulfur dioxide (SO2), while oxygen (O2) is reduced from an oxidation state of 0 to -2 in water (H2O) [[5]].

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