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Aim: To identify the limiting reagent in the reaction on the basis of practical and theoretical yield

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Introduction

Practical Report- 7 ________________ Aim: To identify the limiting reagent in the reaction on the basis of practical and theoretical yield Hypothesis: first three reactions in the experiment potassium iodide is the limiting reagent and in the fourth reaction the reaction is suppose to be complete reaction with no limiting reagent and in the rest of the reactions lead nitrate is the limiting reagent. Requirements: 1. Potassium Iodide 2. Electronic balance±0.01 3. Lead Nitrate 4. Pipette±0.05 5. Round bottom flask 6. Conical flask 7. Glass funnel 8. Filter paper 9. Water Method: 1. weight 20.75gms of potassium iodide on an electronic balance 2. put potassium iodide in a round bottom flask 3. ...read more.

Middle

shake the conical flask containing the mixture gently 13. pour the mixture in the funnel 14. add some hot water in the flask and add the solution the funnel as well 15. wait for the mixture to filtrate and dry 16. measure mass of the dried filtrate 17. deduce the mass of filter paper from the result 18. calculate the theoretical yield of the reaction 19. compare the difference between the theoretical and practical yield 20. repeat the experiment using different volumes of potassium iodide while keeping the amount of lead nitrate same Precautious: 1. do not over flow the filter paper in the filtrating funnel 2. ...read more.

Conclusion

Make sure the round bottom flask is not over or under filled 2. Avoid any parallax error 3. Do not fill the glass funnel more than the filter paper level 4. Make sure all the apparatus is cleaned properly Conclusion: in the first two reactions potassium iodide is the limiting reagent and in the third one the limiting reagent cannot be determined as the results do not differ one way where as in the rest of them lead nitrate seems to be the limiting reagent this can be seen as in the because doesn?t matter by how much the quantity of potassium iodide is increased the yield does not increase but stays in the range of 2.25 to 2.29. ...read more.

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