ha.anon90
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I dont understand this carbonates thing attachment below




What are carbonates and how are they heated? :/
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ha.anon90
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TheConfusedMedic
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metal carbonate ---> metal oxide + carbon dioxide
eg: magnesium carbonate --> magnesium oxide + carbon dioxide

It is a thermal decomposition reaction
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ha.anon90
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(Original post by surina16)
metal carbonate ---> metal oxide + carbon dioxide
eg: magnesium carbonate --> magnesium oxide + carbon dioxide

It is a thermal decomposition reaction
So sodium carbonate-> sodium oxide + carbon dioxide?

Is this the same for all of them?
So carbonates decompose to carbonate oxide and co2?


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Maker
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What don't you understand?
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samb1234
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(Original post by Habina786xx)
I dont understand this carbonates thing attachment below




What are carbonates and how are they heated? :/
Carbonates are compounds that contain the CO3 2- ion. So in this case magnesium Carbonate is MgCO3. When heated they decompose to form a metal oxide (MgO) and carbon dioxide (CO2)
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ha.anon90
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(Original post by Maker)
What don't you understand?
What are carbonates and how are they heated?


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KaylaB
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(Original post by Habina786xx)
What are carbonates and how are they heated?


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Carbonates are molecules containing  {CO_3}^{2-} ions, this could be the standard  CaCO_3 Calcium Carbonate which is limestone, or  {Na_2}CO_3 Sodium Carbonate ect..

They're heated by simply applying heat to it, either direct heat from holding a Bunsen burner over it, or heating the container which it is in
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ha.anon90
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(Original post by KaylaB)
Carbonates are molecules containing  {CO_3}^{2-} ions, this could be the standard  CaCO_3 Calcium Carbonate which is limestone, or  {Na_2}CO_3 Sodium Carbonate ect..

They're heated by simply applying heat to it, either direct heat from holding a Bunsen burner over it, or heating the container which it is in
Ohmygod thats what i needed to know thanksss 💕 you know for extra knowledge whats this? Name:  ImageUploadedByStudent Room1457036809.531583.jpg
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(Original post by Habina786xx)
Ohmygod thats what i needed to know thanksss 💕 you know for extra knowledge whats this? Name:  ImageUploadedByStudent Room1457036809.531583.jpg
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No problem
Can you be a bit more specific to which bit you're referring to?
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ha.anon90
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(Original post by KaylaB)
No problem
Can you be a bit more specific to which bit you're referring to?
Part F please


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TheConfusedMedic
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(Original post by Habina786xx)
Part F please


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What is it asking you to do? Do you have to write an equation for limestone in acid?
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(Original post by Habina786xx)
Part F please


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So a carbonate, like CaCO3 (Calcium Carbonate/Limestone) reacts with an acid like HCl, Hydrochloric Acid, to produce a salt,
CO2 and H2O. So this can be written as the equation:
CaCO3 + HCl ----> CaCl2 + CO2 + H2O
So in this case the salt is CaCl2 which can be found by looking at the metal part of the carbonate (the beginning bit, so in this case it's Ca and combining it with the last part of the acid, so Cl
It's CaCl2 because Calcium has a 2+ charge, Ca2+ and Chlorine has a 1- charge, Cl- meaning that you need 2 Chlorines to balance the charges.

So limestone is damaged by acid rain because it reacts with it which can be seen in this video
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ha.anon90
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(Original post by KaylaB)
Hold on using LaTex is messing it up
Yepp I'm using my phone

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KaylaB
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(Original post by Habina786xx)
Yepp I'm using my phone

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There we go, should be done now, I had to do it the old fashioned way :laugh:
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ha.anon90
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(Original post by KaylaB)
There we go, should be done now, I had to do it the old fashioned way :laugh:


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ha.anon90
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(Original post by KaylaB)
There we go, should be done now, I had to do it the old fashioned way :laugh:


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Looks great except for the last one, Sodium Carbonate would be Na2CO3 as the charge on Sodium is Na+ and Carbonate is CO3 2-, so two Sodium ions are needed to balance the charge.
So the salt would also be changed, as it is Na+ and Cl- reacting together they just become NaCl (table salt) as their charges cancel out.
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(Original post by KaylaB)
Looks great except for the last one, Sodium Carbonate would be Na2CO3 as the charge on Sodium is Na+ and Carbonate is CO3 2-, so two Sodium ions are needed to balance the charge.
So the salt would also be changed, as it is Na+ and Cl- reacting together they just become NaCl (table salt) as their charges cancel out.
OHHH. Thank youu x


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If you want any science help take a look at this and leave a message on here
http://www.thestudentroom.co.uk/show....php?t=3897511
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