Question

Визначити реакцію, що відбувається в розчині до кінця. Записати її в молекулярному, повному та скороченому йонному вигляді: а) Ba(OH)2 + HNO3 → ; б) Ba(OH)2 + KNO3 → .

Answer 1

Так: Ba(OH)2 + 2 HNO3 ------> Ba(NO3)2 + 2 H2O, 
Ba(2+) + 2 OH(-) + 2 H(+) + 2 NO3(-) ------> Ba(2+) + 2 NO3(-) + 2 H2O, 
2 OH(-) + 2 H(+) ------> 2 H2O. 
Ba(OH)2 + 2 KNO3 <-------------> Ba(NO3)2 + 2 KOH, 
Ba(2+) + 2 OH(-) + 2 K(+) + 2 NO3(-) ------> Ba(2+) + 2 NO3(-) + 2 K(+) + 2 OH(-), в левой и правой части одинаковые ионы, реакция не идет.

Answer 2

Reaction in Solution

The given reactions involve the reaction of barium hydroxide (Ba(OH)2) with nitric acid (HNO3) and potassium nitrate (KNO3). Let's determine the reaction that occurs in each case and write it in molecular, complete ionic, and net ionic forms.

a) Ba(OH)2 + HNO3 →

b) Ba(OH)2 + KNO3 →

Reaction between Ba(OH)2 and HNO3

When barium hydroxide (Ba(OH)2) reacts with nitric acid (HNO3), a neutralization reaction occurs. The products of this reaction are barium nitrate (Ba(NO3)2) and water (H2O).

The balanced molecular equation for this reaction is:

Ba(OH)2 + 2HNO3 → Ba(NO3)2 + 2H2O

To write the complete ionic equation, we need to break down the soluble ionic compounds into their respective ions:

Ba(OH)2(aq) + 2HNO3(aq) → Ba(NO3)2(aq) + 2H2O(l)

In the complete ionic equation, the aqueous compounds are represented as their dissociated ions.

The net ionic equation is obtained by removing the spectator ions (ions that appear on both sides of the equation without undergoing any change):

Net ionic equation: Ba(OH)2(aq) + 2H+(aq) → Ba2+(aq) + 2H2O(l)

Reaction between Ba(OH)2 and KNO3

When barium hydroxide (Ba(OH)2) reacts with potassium nitrate (KNO3), a double displacement reaction occurs. The products of this reaction are barium nitrate (Ba(NO3)2) and potassium hydroxide (KOH).

The balanced molecular equation for this reaction is:

Ba(OH)2 + 2KNO3 → Ba(NO3)2 + 2KOH

To write the complete ionic equation, we need to break down the soluble ionic compounds into their respective ions:

Ba(OH)2(aq) + 2KNO3(aq) → Ba(NO3)2(aq) + 2KOH(aq)

In the complete ionic equation, the aqueous compounds are represented as their dissociated ions.

The net ionic equation is obtained by removing the spectator ions (ions that appear on both sides of the equation without undergoing any change):

Net ionic equation: Ba(OH)2(aq) + 2OH-(aq) → Ba2+(aq) + 2OH-(aq)

In this case, the net ionic equation simplifies to:

Net ionic equation: Ba(OH)2(aq) → Ba2+(aq) + 2OH-(aq)

Please note that the net ionic equation for both reactions involves the formation of barium ions (Ba2+) and hydroxide ions (OH-).