A few chemistry questions basically proportion calculations

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Discussion Overview

The discussion revolves around stoichiometric calculations related to chemical reactions, specifically focusing on the reaction of chloroethane with oxygen and the resulting production of carbon dioxide. Participants also explore a related question about temperature changes when mixing hydrochloric acid and sodium hydroxide solutions. The scope includes homework-related problem-solving and mathematical reasoning.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Technical explanation

Main Points Raised

  • One participant requests assistance with stoichiometric calculations involving chloroethane and oxygen.
  • Another participant emphasizes the importance of understanding reaction equations and converting amounts to moles.
  • Several participants discuss the stoichiometry of the reaction, noting that 5 moles of oxygen produce 4 moles of CO2.
  • There is a mention of the need to check if there is enough chloroethane to react with the available oxygen, introducing the concept of limiting reagents.
  • Participants express uncertainty about the calculations, with one asking how many moles of CO2 would be produced from 3 moles of O2.
  • A later reply suggests a calculation of 2.4 moles of CO2 based on the stoichiometric ratios provided.

Areas of Agreement / Disagreement

Participants generally agree on the stoichiometric relationships in the reaction, but there is uncertainty regarding the calculations and the limiting reagent aspect. Multiple views on the calculations remain, and the discussion does not reach a consensus on the final answer.

Contextual Notes

Participants have not fully resolved the limiting reagent aspect of the problem, and there are varying interpretations of the calculations involved. The discussion reflects different levels of understanding of stoichiometry.

Who May Find This Useful

This discussion may be useful for students seeking help with stoichiometric calculations in chemistry, particularly those dealing with limiting reagents and temperature changes in reactions.

lionely
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Homework Statement



Chloroethane, reacts with Oxygen according to the equation below:
2C2H3Cl + 5O2 → 4CO2 + 2H2O
+2HCl
How many moles of CO2 are produced when 3.0 moles of choloroethane and 3 mol of O2 are reacted?When 50cm3 of 1mol/dm3 HCl is mixed with 50cm3 of 1mol/dm3 NaOH, the temp of the resulting solution increases by 6 °C. What will be the temp change when 100cm3 of each of these solutions are mixed?


I'm sorry I don't really have any idea on how to attempt these properly, could you guys give me a hint? Please! The help would be greatly appreciated !
 
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So for the first one it is 5mole of Oxygen gives 4 mole of CO2? so
3mole of Oxygen gives X moles?
 
lionely said:
So for the first one it is 5mole of Oxygen gives 4 mole of CO2? so
3mole of Oxygen gives X moles?

Yes, but you have to check if there is enough chloroethane to react with 3 moles of oxygen. Could be there is not enough, then you will have to calculate amount of CO2 knowing that 2 moles of chloroethane produce 4 moles of carbon dioxide.

This is so called limiting reagent problem.
 
So is it 2 moles of chloroethane react with to produce 4 mole of carbon dioxide
so 3moles gives x?
 
Yes.
 
So the overall answer is 6moles of CO2?
 
How many moles of CO2 would be produced from 3 moles of O2?
 
2.4moles
 

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