Chemistry - Reaction in humid air

In summary, the chemical equilibrium for sulfur dioxide reacting with humid air to produce sulfur trioxide can be represented by the equation 2 SO2 + O2 + 2 H2O(g) --> 2 SO3 + 2 H2O(g). This equation can be balanced and any water present on both sides can be treated as a catalyst.
  • #1
MarcMTL
26
0

Homework Statement



Sulfur dioxide reacts with humid air to produce Sulfure trioxide. Find the chemical equilibirum.

Homework Equations




The Attempt at a Solution



I wrote out that:

SO2 + O2 + H2O(g) --> SO3 + H2O(g)

And balanced, I obtain:

2 SO2 + O2 + 2 H2O(g) --> 2 SO3 + 2 H2O(g)

Is this the correct formula for the reaction of SO2 with humid air?
I seem to find that the H20 doesn't react at all, it is basically endups as H2O at the end of the reaction.

Thanks for letting me know if I'm on the right track.

Marc
 
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  • #2
If water is present on both sides of the equation in identical quantities, it cancels out. If its presence is necessary for the reaction, it can be treated as a catalyst, so you should write H2O above the arrow.

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1. How does humidity affect chemical reactions?

Humidity can affect chemical reactions in several ways. First, water molecules in humid air can react with certain substances, causing them to degrade or change in composition. Additionally, humidity can impact the speed of a reaction by reducing the rate of evaporation, which is a crucial step in many chemical reactions. Higher humidity can also increase the chances of a reaction occurring between reactant molecules, as they are more likely to collide in a humid environment.

2. Can humidity impact the outcome of a chemical reaction?

Yes, humidity can impact the outcome of a chemical reaction. The presence of water molecules in humid air can alter the chemical properties of substances, potentially leading to different products or reactions. Additionally, the speed of a reaction can be affected by humidity, which can impact the overall outcome.

3. How does temperature play a role in chemical reactions in humid air?

Temperature can play a significant role in chemical reactions in humid air. Higher temperatures can increase the rate of evaporation, which can speed up certain reactions. However, high temperatures can also cause water molecules to evaporate, reducing the overall humidity and potentially altering the reaction. It is important to carefully control the temperature and humidity in a chemical reaction to achieve the desired outcome.

4. Can humidity affect the stability of chemicals?

Yes, humidity can affect the stability of chemicals. Water molecules in humid air can react with certain substances, causing them to degrade or become unstable. This is particularly important to consider when storing and handling chemicals, as exposure to high humidity can alter their properties and potentially make them hazardous.

5. How can humidity be controlled in a lab setting to ensure accurate results?

To control humidity in a lab setting, various measures can be taken. The use of desiccants, such as silica gel, can help absorb excess moisture in the air. Additionally, proper ventilation and air conditioning can help regulate humidity levels. It is also important to seal and store chemicals properly to prevent exposure to humid air. Regularly monitoring and adjusting humidity levels in a lab can help ensure accurate and consistent results in chemical reactions.

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