Calculating Water Formation in Eudiometery: Oxygen and Hydrogen Reaction

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SUMMARY

The discussion focuses on the reaction between 1 litre of oxygen (O2) and 1 litre of hydrogen (H2) to form water (H2O) in a 2-litre vessel at normal temperature and pressure. The reaction produces 1 gram of water for every 2 grams of hydrogen and 16 grams of oxygen consumed, resulting in 18 grams of water formed. After the reaction, unreacted hydrogen remains in the vessel, and upon heating, the pressure inside the vessel can be calculated using the ideal gas law, which will be approximately 760 mm of Hg at standard conditions.

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  • Knowledge of gas laws, particularly the ideal gas law
  • Familiarity with standard temperature and pressure (STP) conditions
  • Basic chemistry concepts, including molecular composition of water
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JAIN JAIMIK
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1 litre of oxygen and 1 litre of hydrogen are taken in a vessel of 2 litre capacity at normal temperature pressure .The gases are made to combine by applying electric spark . Assume that water is formed quantitively .How many grams of water are formed? What is the other component present in the vessel and in what weight ? If the vessel is now heated ,what will be the pressure inside the vessel in mm of Hg ? :smile:
 
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Water is H2O so each water molecule requires one oxygen and two hydrogen atoms. How many oxygen atoms are there is a liter of oxygen (I assume at standard temperature and pressure- remember that molecular oxygen is O2-two atoms to each molecule- same for hydrogen, H2)? How many hydrogen atoms are there in a liter of hydrogen?

Matching up hydrogen and oxygen atoms in a 2 to 1 ratio (Again, water is H2O), are there enough hydrogen atoms to match all the oxygen atoms, are there enough oxygen atoms to match all the hydrogen atoms? If not, which will be left over? How many molecules of water can you make? What is the mass of that much water?
 

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