Question

Написати рівняння реакцій між такими речовинами: а) кадмій гідроксид + ортофосфатна кислота; б) рубідій + вода; в) цезій гідроксид + ортофосфатна кислота; г) скандій сульфат + барій хлорид; д) галій хлорид + аргентум нітрат; є) скандій гідроксид + сульфатна кислота. 2. Складіть електронний баланс: K2Cr2O7 + FeSO4 + H2SO4 = Cr2(SO4)3 + K2SO4 + Fe2(SO4)3 + H2O

Answer 1

Ответ:

а) 3Cd(OH)₂ + 2H₃PO₄ → Cd₃(PO₄)₂ + 6H₂O

б) 2Rb + 2H₂O → 2RbOH + H₂

в) 3CsOH + H₃PO₄ → Cs₃PO₄ + 3H₂O

г) Sc₂(SO₄)₃ + 3BaCl₂ → 2ScCl₃ + 3BaSO₄

д) GaCl₃ + 3AgNO₃ → Ga(NO₃)₃ + AgCl

е) 2Sc(OH)₃ + 3H₂SO₄ → Sc₂(SO₄)₃ + 6H₂O

2. Фото ниже)

Answer 2

Reaction Equations:

a) Cadmium hydroxide + orthophosphoric acid: - Equation: Cd(OH)2 + H3PO4 → Cd3(PO4)2 + H2O - Source: [[1]]

b) Rubidium + water: - Equation: 2Rb + 2H2O → 2RbOH + H2 - Source: [[2]]

c) Cesium hydroxide + orthophosphoric acid: - Equation: CsOH + H3PO4 → Cs3PO4 + H2O - Source: [[3]]

d) Scandium sulfate + barium chloride: - Equation: Sc2(SO4)3 + 3BaCl2 → 2ScCl3 + 3BaSO4 - Source: [[4]]

e) Gallium chloride + silver nitrate: - Equation: GaCl3 + 3AgNO3 → Ga(NO3)3 + 3AgCl - Source: [[5]]

f) Scandium hydroxide + sulfuric acid: - Equation: Sc(OH)3 + 3H2SO4 → Sc2(SO4)3 + 3H2O - Source: [[6]]

Electron Balance:

The given equation is: K2Cr2O7 + FeSO4 + H2SO4 = Cr2(SO4)3 + K2SO4 + Fe2(SO4)3 + H2O

To balance the equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

Balanced equation: K2Cr2O7 + 6FeSO4 + 7H2SO4 = Cr2(SO4)3 + K2SO4 + 3Fe2(SO4)3 + 7H2O

Explanation: - Chromium (Cr): There are 2 chromium atoms on the left side and 2 chromium atoms on the right side, so it is balanced. - Potassium (K): There are 2 potassium atoms on the left side and 2 potassium atoms on the right side, so it is balanced. - Oxygen (O): There are 14 oxygen atoms on the left side and 14 oxygen atoms on the right side, so it is balanced. - Sulfur (S): There are 12 sulfur atoms on the left side and 12 sulfur atoms on the right side, so it is balanced. - Iron (Fe): There are 6 iron atoms on the left side and 6 iron atoms on the right side, so it is balanced. - Hydrogen (H): There are 14 hydrogen atoms on the left side and 14 hydrogen atoms on the right side, so it is balanced.

Note: The balanced equation is obtained by adjusting the coefficients in front of each compound to ensure that the number of atoms of each element is the same on both sides of the equation.