Question

ОЧЕНЬ СРОЧНО!! Допишите реакции, расставьте коэффициенты, если это необходимо. Укажите тип реакции. Укажите вещества, выпавшие в осадок:А) СаО+Н2О —>Б) FeSO4+NaOH —>В) Na2Co3+Ca(OH)2 —>Г) Na2O+H2O —>

Answer 1

Ответ:CaO + H2O → Ca(OH)2 (осадок)

FeSO4 + 2 NaOH → Na2SO4 + Fe(OH)2 (осадок)

Na2CO3 + Ca(OH)2  → CaCO3 (осадок) + 2 NaOH

Na2O + H2O → 2 NaOH (нет осадка)

Объяснение:

Answer 2

#### Reaction A: CaO + H2O -> Ca(OH)2 This is a double displacement reaction, also known as a precipitation reaction. The reactants are calcium oxide (CaO) and water (H2O), and the product is calcium hydroxide (Ca(OH)2). In this reaction, the calcium oxide reacts with water to form calcium hydroxide. The balanced equation for this reaction is: **CaO + H2O -> Ca(OH)2** The precipitate formed in this reaction is calcium hydroxide (Ca(OH)2) [[1]]. #### Reaction B: FeSO4 + 2NaOH -> Fe(OH)2 + Na2SO4 This is also a double displacement reaction. The reactants are iron(II) sulfate (FeSO4) and sodium hydroxide (NaOH), and the products are iron(II) hydroxide (Fe(OH)2) and sodium sulfate (Na2SO4). The balanced equation for this reaction is: **FeSO4 + 2NaOH -> Fe(OH)2 + Na2SO4** The precipitate formed in this reaction is iron(II) hydroxide (Fe(OH)2) [[2]]. #### Reaction C: Na2CO3 + Ca(OH)2 -> 2NaOH + CaCO3 This is a double displacement reaction. The reactants are sodium carbonate (Na2CO3) and calcium hydroxide (Ca(OH)2), and the products are sodium hydroxide (NaOH) and calcium carbonate (CaCO3). The balanced equation for this reaction is: **Na2CO3 + Ca(OH)2 -> 2NaOH + CaCO3** The precipitate formed in this reaction is calcium carbonate (CaCO3) [[3]]. #### Reaction D: Na2O + H2O -> 2NaOH This is a combination reaction. The reactants are sodium oxide (Na2O) and water (H2O), and the product is sodium hydroxide (NaOH). The balanced equation for this reaction is: **Na2O + H2O -> 2NaOH** No precipitate is formed in this reaction. I hope this helps! Let me know if you have any further questions. [[1]] Source: [Chemistry LibreTexts - Precipitation Reactions](https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/04._Reactions_in_Aqueous_Solution/4.4%3A_Precipitation_Reactions) [[2]] Source: [Chemistry LibreTexts - Double Displacement Reactions](https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/04._Reactions_in_Aqueous_Solution/4.3%3A_Double_Displacement_Reactions) [[3]] Source: [Chemistry LibreTexts - Double Displacement Reactions](https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/04._Reactions_in_Aqueous_Solution/4.3%3A_Double_Displacement_Reactions)