Question

Помогите пожалуйстаааааааааа!!11!!!!1.Сокращённые ионные уравнения характеризуют сущность химической реакции и показывают , какие ионы ****, *********** и какое вещество ****** , **** в результате реакции. 2.Реакции ионного обмена в растворах электролитов практически осуществимы (протекают до конца ) только в тех случаях , когда в результает реакции образуется слабый электролит (например ,****),***или******._???_

Answer 1

1. Сокращенные ионные уравнения характеризуют сущность химической реакции и показывают какие ионы РЕАГИРУЮТ и какое вещество ОБРАЗУЕТСЯ в результате реакции.

2. Реакции ионного обмена в растворах электролитов практически осуществимы (протекают до конца) только в тех случаях, когда в результате реакции образуется слабый электролит (например, H2O),выпадает осадок или выделяется газ

 

 

Answer 2

Ion Equations in Chemical Reactions

Ion equations are a way to represent the essence of a chemical reaction and show which ions are involved and what substances are formed as a result of the reaction. They are commonly used in chemistry to describe reactions that occur in aqueous solutions.

In an ion equation, the reactants and products are represented as ions rather than as complete molecules. This allows us to focus on the specific ions that are involved in the reaction. The overall charge on both sides of the equation must be balanced to ensure that the reaction obeys the law of conservation of charge.

For example, let's consider the reaction between sodium chloride (NaCl) and silver nitrate (AgNO3) to form silver chloride (AgCl) and sodium nitrate (NaNO3):

NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq)

In this equation, the (aq) notation indicates that the substance is dissolved in water and exists as ions. The (s) notation indicates that the substance is a solid.

Ion Exchange Reactions in Electrolyte Solutions

Ion exchange reactions occur when ions from two different compounds switch places in a solution. These reactions are commonly observed in electrolyte solutions, which are solutions that conduct electricity due to the presence of ions.

In order for an ion exchange reaction to occur to completion, certain conditions must be met. One important condition is the formation of a weak electrolyte as a product of the reaction. A weak electrolyte is a substance that only partially dissociates into ions in solution.

For example, let's consider the reaction between sodium chloride (NaCl) and silver nitrate (AgNO3) again:

NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq)

In this reaction, silver chloride (AgCl) is formed as a solid, which means it does not dissociate into ions in solution. On the other hand, sodium nitrate (NaNO3) is a strong electrolyte that dissociates completely into sodium ions (Na+) and nitrate ions (NO3-) in solution.

Therefore, the reaction between NaCl and AgNO3 can be considered an ion exchange reaction that occurs to completion because one of the products, AgCl, is a weak electrolyte that does not dissociate into ions.

I hope this explanation helps! Let me know if you have any further questions.