Question

ДАЮ 50 БАЛЛОВ ХИМИЯ 9 КЛАСС Причиной образования накипи в чайнике является жёсткая вода, содержащая гидрокарбонат кальция Са(НСО3)2. Для устранения жёсткости воды применяют карбонат натрия или известковую воду Са(ОН)2 . напишите уравнение реакции в молекулярном и ионном виде.​

Answer 1

Сa(HCO3)2+ Ca(OH)2 = 2CaCO3 ↓ +2H2O

Answer 2

Formation of Scale in a Kettle

The formation of scale in a kettle is primarily caused by hard water, which contains calcium hydrocarbonate (Ca(HCO3)2). To remove the hardness of water, sodium carbonate (Na2CO3) or slaked lime (Ca(OH)2) can be used. Let's write the balanced chemical equation for the reaction in both molecular and ionic forms.

Molecular Equation:

The molecular equation for the reaction between calcium hydrocarbonate and sodium carbonate is as follows:

Ca(HCO3)2 + Na2CO3 → CaCO3 + 2NaHCO3

Ionic Equation:

To write the ionic equation, we need to break down the reactants and products into their respective ions:

Reactants: Ca(HCO3)2: Ca^2+ + 2HCO3^- Na2CO3: 2Na^+ + CO3^2-

Products: CaCO3: Ca^2+ + CO3^2- 2Na