Question

Напишіть рівняння реакцій, за допомогою яких можна здійснити перетворення речовин: 1. na → naoh → na2co3 2. ca → cao → ca(oh)2→ caco3

Answer 1

Ответ:

1) Na+H2O=NaOH+0,5H2

2NaOH+CO2=Na2CO3+H2O

2) Ca+0,5O2=CaO

CaO+h2O=Ca(OH)2

Ca(OH)2+CO2=CaCO3+H2O

Answer 2

Equations for the given chemical transformations:

1. Sodium (Na) to Sodium Hydroxide (NaOH) to Sodium Carbonate (Na2CO3): - Equation 1: 2Na + 2H2O → 2NaOH + H2 [[1]] - Equation 2: NaOH + CO2 → NaHCO3 [[2]] - Equation 3: 2NaHCO3 → Na2CO3 + H2O + CO2 [[3]]

2. Calcium (Ca) to Calcium Oxide (CaO) to Calcium Hydroxide (Ca(OH)2) to Calcium Carbonate (CaCO3): - Equation 1: Ca + O2 → CaO [[4]] - Equation 2: CaO + H2O → Ca(OH)2 [[5]] - Equation 3: Ca(OH)2 + CO2 → CaCO3 + H2O [[6]]

Please note that these equations represent the chemical transformations you mentioned. Each equation shows the reactants and products involved in the reaction. The numbers in front of the chemical formulas represent the stoichiometric coefficients, indicating the relative amounts of each substance involved in the reaction.

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