Chemistry: Van´t Hoff factor for baking soda

  • Thread starter Lemm
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In summary, the conversation discusses using the equation deltaT = iKm to calculate the boiling point elevation of distilled water with added solutes. The predicted elevations for salt and sugar, with van´t hoff factors of 2 and 1 respectively, were calculated. However, the van´t hoff factor for baking soda is unknown and the formula and dissolution process are also questioned. A request is made for the van´t hoff factor and a reaction equation for baking soda.
  • #1
Lemm
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Hello,
Im writing up a lab involving boiling point elevation of distilled water when solutes are added to it and I am using the equation:

deltaT = iKm

where:
deltaT is the change in boiling point of the solvent,
K is the molal boiling point elevation constant, and
m is the molal concentration of the solute in the solution.

I calculated the predicted elevation for salt and sugar, which i could find their van´t hoff factor to be 2, and 1 respectively. However I fail to find the van´t hoff factor for baking soda, could somebody please provide me with this value?
Thanks
 
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  • #2
What is a baking soda formula? How does it dissolve? Does it dissociate? Can you write reaction equation?
 
  • #3
for your question. The Van´t Hoff factor for baking soda, also known as sodium bicarbonate, is 2. This means that when baking soda is dissolved in water, it dissociates into two ions: sodium (Na+) and bicarbonate (HCO3-). This is important to consider when calculating the boiling point elevation of a solution containing baking soda.

However, it is worth noting that the Van´t Hoff factor can vary depending on the concentration and temperature of the solution. It is best to consult a reliable source or conduct your own experiment to determine the exact Van´t Hoff factor for your specific solution.
 

1. What is the Van't Hoff factor for baking soda?

The Van't Hoff factor for baking soda (sodium bicarbonate) is 2. This means that when one mole of baking soda is dissolved in water, it dissociates into two ions: sodium (Na+) and bicarbonate (HCO3-). The presence of these ions in solution allows for better conductivity and increased colligative properties, such as boiling point elevation and freezing point depression.

2. How is the Van't Hoff factor for baking soda determined?

The Van't Hoff factor for baking soda is determined experimentally by measuring the colligative properties (such as freezing point depression or boiling point elevation) of a solution containing a known amount of baking soda. The observed change in these properties can then be compared to the expected change based on the number of ions present in the solution, allowing for the calculation of the Van't Hoff factor.

3. Does the Van't Hoff factor for baking soda change in different solvents?

Yes, the Van't Hoff factor for baking soda can vary depending on the solvent in which it is dissolved. This is because the degree of dissociation of a substance can be influenced by factors such as temperature, pressure, and the nature of the solvent. For example, the Van't Hoff factor for baking soda may be slightly higher when dissolved in a polar solvent compared to a nonpolar solvent.

4. How does the Van't Hoff factor for baking soda affect the properties of a solution?

The Van't Hoff factor for baking soda plays a significant role in determining the colligative properties of a solution. As mentioned earlier, it can lead to changes in the boiling point and freezing point of a solution. Additionally, the Van't Hoff factor can also affect the osmotic pressure and vapor pressure of a solution.

5. Can the Van't Hoff factor for baking soda be greater than 2?

Yes, the Van't Hoff factor for baking soda can be greater than 2 in certain cases. This can occur if there are other substances present in the solution that can also dissociate and contribute additional ions. For example, if baking soda is dissolved in a solution containing both sodium chloride (NaCl) and sodium bicarbonate, the Van't Hoff factor will be higher due to the presence of the additional sodium ions from the NaCl.

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