GCSE chemistry help ?

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shaheryar9
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the following question is based on the public material released from the AQA exam board
This question is about silver iodide
silver iodide is produced in the reaction between silver nitrate solution and sodium iodide solution
the equation for the reaction is:
AgNO3(aq)+ Nal(aq)--> AgI(s)+NaNO3(aq)
the student separated the insoluble silver iodide from the mixture via filtration at the end of the reaction.
the student then purified the separated the silver iodide
this is the method used:
1. rinse the silver iodide with distilled water
2. warm the silver iodide

suggest one impurity that was removed by rinsing with water?

suggest why the student warmed the silver iodide?


can someone help with the two questions?
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interlanken-fall
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#2
impurity could be the NaNO3
warmed to evaporate any water
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willmaz40
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an impurity that was removed is any excess mixture still left on the silver iodide
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Maykulka
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Relating to that question do you know "how the results demonstrate the law of conservation of mass"?
The results were (as attached)
Attached files
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scimus63
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try looking here, it may help you!
https://www.science-revision.co.uk/c...n_of_mass.html
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ZKhan0786
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(Original post by Maykulka)
Relating to that question do you know "how the results demonstrate the law of conservation of mass"?
The results were (as attached)
If you add both masses before mixing you get 156.76 and if you add both masses after mixing you get 156.76. This demonstrates the law of conservation of mass as the products = reactants - nothing is gained or lost. Hope this helps!
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Maykulka
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(Original post by ZKhan0786)
If you add both masses before mixing you get 156.76 and if you add both masses after mixing you get 156.76. This demonstrates the law of conservation of mass as the products = reactants - nothing is gained or lost. Hope this helps!
Thank you for your help!!!!
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M_Powell2004
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(Original post by shaheryar9)
the following question is based on the public material released from the AQA exam board
This question is about silver iodide
silver iodide is produced in the reaction between silver nitrate solution and sodium iodide solution
the equation for the reaction is:
AgNO3(aq)+ Nal(aq)--> AgI(s)+NaNO3(aq)
the student separated the insoluble silver iodide from the mixture via filtration at the end of the reaction.
the student then purified the separated the silver iodide
this is the method used:
1. rinse the silver iodide with distilled water
2. warm the silver iodide

suggest one impurity that was removed by rinsing with water?

suggest why the student warmed the silver iodide?


can someone help with the two questions?
Relating to that question, can you "suggest how the student could separate the insoluble silver iodide from the mixture at the end of the reaction"? I'm assuming it's filtration but i'm not 100% sure :/
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Tia.n
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(Original post by M_Powell2004)
Relating to that question, can you "suggest how the student could separate the insoluble silver iodide from the mixture at the end of the reaction"? I'm assuming it's filtration but i'm not 100% sure :/
I would say filtration
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