# Does sodium bicarbonate solution release CO2 when heated?

• Tohtori huithapeli
In summary, solid sodium bicarbonate decomposes above 50 degrees Celsius and this process changes when it is dissolved in water. When heated, sodium hydrogen carbonate solution may release carbon dioxide, depending on the partial pressure of CO2 and the concentration of the solution. At concentrations above 1 or 2 mM, sodium bicarbonate will likely lose CO2 when heated.
Tohtori huithapeli

## Homework Statement

Solid sodium bicarbonate decompose when it's heated above 50 celsius. However, when it is dissolved in water interactions of components changes. So what happens when sodium hydrogen carbonate solution is heated? Does it release carbon dioxide when temperature is above 50 celsius?

## Homework Equations

Decomposition:
NaHCO3(s)-> NaOh(s) + CO2(g)
NaHCO3(s) -> NaCO2 (s) + CO2(g) + H2o (g)
NaHCO3(s) -> Na2O(s) + CO2(g) + H2O (g)

Solution:
NaHCO3(s) + H2O (l) -> Na+ (aq) + HCO3-(aq) + H2O(l)

That depends on the partial pressure of CO2, but in typical conditions solution of bicarbonate will be very slowly loosing the gas even at room temperature.

Yes, I've had a hard time calculating it because of the different values and silly units I find quoted in various places for the water solubility of CO2, but I think above 1 or 2 mM sodium bicarbonate would lose CO2. But anyway, you can think about what would happen at that sort of concentration if you started with the solution in equilibrium with the atmospheric CO2 and then raised the solution temperature.

## 1. What is sodium bicarbonate solution?

Sodium bicarbonate solution, also known as baking soda solution, is a mixture of sodium bicarbonate (NaHCO3) and water.

## 2. Does sodium bicarbonate solution release CO2 when heated?

Yes, sodium bicarbonate solution releases carbon dioxide (CO2) when heated. This is because sodium bicarbonate is a bicarbonate salt, which contains a bicarbonate ion (HCO3-) that releases CO2 when heated.

## 3. How does the release of CO2 occur in sodium bicarbonate solution?

When sodium bicarbonate solution is heated, the bicarbonate ions (HCO3-) in the solution decompose into carbon dioxide (CO2) gas, water (H2O), and a sodium ion (Na+). This reaction is known as thermal decomposition.

## 4. Is the release of CO2 from sodium bicarbonate solution a chemical or physical change?

The release of CO2 from sodium bicarbonate solution is a chemical change. This is because the bicarbonate ions in the solution are breaking down and forming new substances (CO2, H2O, and Na+), resulting in a change in the chemical composition of the solution.

## 5. Does the amount of CO2 released from sodium bicarbonate solution change with temperature?

Yes, the amount of CO2 released from sodium bicarbonate solution increases with temperature. This is because higher temperatures provide more energy for the thermal decomposition reaction to occur, resulting in more CO2 being released.

• Biology and Chemistry Homework Help
Replies
1
Views
2K
• Biology and Chemistry Homework Help
Replies
1
Views
2K
• Chemistry
Replies
1
Views
2K
• Biology and Chemistry Homework Help
Replies
5
Views
2K
• General Math
Replies
1
Views
1K
• Biology and Chemistry Homework Help
Replies
2
Views
17K
• Biology and Chemistry Homework Help
Replies
6
Views
13K
• Biology and Chemistry Homework Help
Replies
4
Views
7K
• Biology and Chemistry Homework Help
Replies
4
Views
3K
• Biology and Chemistry Homework Help
Replies
1
Views
3K