Question

ТЕРМІНОВО!! 55 балів Запишіть мету. Реактиви: розчини кальцій хлориду ,калій карбонату, натрій гідроксиду, сульфатної кислоти.Здійсніть реакції обміну між розчинами електролітів з утворенням:а) осаду; б) газу; в) води.Запишіть рівняння реакцій в молекулярній та йонній формах.Зробіть висновок.

Answer 1

Ответ:

Реакції обміну між розчинами електролітів

Реактиви:

Кальцій хлорид (CaCl2)

Калій карбонат (K2CO3)

Натрій гідроксид (NaOH)

Сульфатна кислота (H2SO4)

Утворення осаду

Реакція 1:

Молекулярне рівняння:

Answer 2

Objective:

The objective of this experiment is to observe and record the reactions that occur when solutions of calcium chloride, potassium carbonate, sodium hydroxide, and sulfuric acid are mixed together. Specifically, we will focus on reactions that result in the formation of precipitates, gases, and water. We will write the balanced chemical equations for these reactions in both molecular and ionic forms and draw conclusions based on our observations.

Reactions and Observations:

a) Formation of Precipitate: When solutions of calcium chloride and sodium carbonate are mixed together, a reaction occurs that results in the formation of a precipitate. The balanced chemical equation for this reaction is as follows:

CaCl2(aq) + Na2CO3(aq) → CaCO3(s) + 2NaCl(aq)

In ionic form, the equation can be represented as:

Ca^2+(aq) + 2Cl^-(aq) + 2Na^+(aq) + CO3^2-(aq) → CaCO3(s) + 2Na^+(aq) + 2Cl^-(aq)

The observation will be the formation of a white precipitate of calcium carbonate (CaCO3).

b) Formation of Gas: When solutions of potassium carbonate and sulfuric acid are mixed together, a reaction occurs that results in the formation of a gas. The balanced chemical equation for this reaction is as follows:

K2CO3(aq) + H2SO4(aq) → CO2(g) + H2O(l) + K2SO4(aq)

In ionic form, the equation can be represented as:

2K^+(aq) + CO3^2-(aq) + 2H^+(aq) + SO4^2-(aq) → CO2(g) + H2O(l) + 2K^+(aq) + SO4^2-(aq)

The observation will be the release of carbon dioxide gas (CO2), which may be observed as bubbles or effervescence.

c) Formation of Water: When solutions of sodium hydroxide and sulfuric acid are mixed together, a neutralization reaction occurs that results in the formation of water. The balanced chemical equation for this reaction is as follows:

NaOH(aq) + H2SO4(aq) → H2O(l) + Na2SO4(aq)

In ionic form, the equation can be represented as:

Na^+(aq) + OH^-(aq) + 2H^+(aq) + SO4^2-(aq) → H2O(l) + Na^+(aq) + SO4^2-(aq)

The observation will be the formation of water (H2O), which may not be visually apparent but can be inferred from the reaction equation.

Conclusion:

In this experiment, we observed and recorded the reactions that occurred when solutions of calcium chloride, potassium carbonate, sodium hydroxide, and sulfuric acid were mixed together. We observed the formation of a precipitate when calcium chloride and sodium carbonate were mixed, the release of gas when potassium carbonate and sulfuric acid were mixed, and the formation of water when sodium hydroxide and sulfuric acid were mixed. These reactions can be represented by balanced chemical equations in both molecular and ionic forms. By conducting this experiment and analyzing the reactions, we gained a better understanding of the exchange reactions between electrolyte solutions and the formation of different products.