Magnesium and Berylium react with H2SO4 to produce MgSO4 + H2, but Calcium, Strontium and Barium with Dilute H2SO4, is a little more complicated.
Is this what happens or what you'd say happens:
Calcium, Strontium and Barium Sulphates are thought to be insoluble, hence a layer of insoluble sulphate will form, causing the reaction to slow down or stop completely.
So, does these group 2 elements not react with Dilute H2SO4?
It would produce a white precipitate and H2 bubbles. What is the equation for the reaction?
Magnesium and Berylium react with H2SO4 to produce MgSO4 + H2, but Calcium, Strontium and Barium with Dilute H2SO4, is a little more complicated.
Is this what happens or what you'd say happens:
Calcium, Strontium and Barium Sulphates are thought to be insoluble, hence a layer of insoluble sulphate will form, causing the reaction to slow down or stop completely.
So, does these group 2 elements not react with Dilute H2SO4?
It would produce a white precipitate and H2 bubbles. What is the equation for the reaction?
Can someone explain this question and answer to me? its about enthalpy and calorimetry. "Give reason, other than hear loss, why the value obtained from student's results are less exothermic than a data book value?" The answer is incomplete combustion but why?
Less energy is released when co or c are made instead of co2 (aka incomplete combustion) so if less energy is released this will make the enthalpy value less exo
Less energy is released when co or c are made instead of co2 (aka incomplete combustion) so if less energy is released this will make the enthalpy value less exo
Can someone explain this question and answer to me? its about enthalpy and calorimetry. "Give reason, other than hear loss, why the value obtained from student's results are less exothermic than a data book value?" The answer is incomplete combustion but why?
Can someone explain this question and answer to me? its about enthalpy and calorimetry. "Give reason, other than hear loss, why the value obtained from student's results are less exothermic than a data book value?" The answer is incomplete combustion but why?
Hi
Incomplete combustion will lead to soot, carbon monoxide and water. It is less exothermic than complete combustion, due to less heat energy being emitted.
Can someone explain this question and answer to me? its about enthalpy and calorimetry. "Give reason, other than hear loss, why the value obtained from student's results are less exothermic than a data book value?" The answer is incomplete combustion but why?
The values in the book are average/mean values. Whereas the values attained by the student are under specific conditions.
Could somebody tell me what it would mean if a cream precipitate forms, and then dissolves when nitric acid is added? I understand that nitric acid removes carbonate ions, but i was under the impression that carbonate ions form a white precipitate? Thanks!
Anyone have any tips on good ways to revise chemistry? I'm really struggling. Plain reading the book isn't working and with making notes I tend to waste a lot of time getting it all neat and pretty and end up not getting much in my head, plus it's really quite late stage to be making notes now. I also didn't want to do papers till later because there aren't many so I want to save them. What do I do???
Spoiler
It's ok, this is me in Chemistry and Physics...sigh. What I've learnt that's working for me is to use the specification as a checklist. Literally, it tells you things to expect- what definitions you need to learn as only certain things you will be asked on. On Physics maths tutor- he has a page with past papers listed by the contents which helped me as after going over a chapter of for example moles- I found past paper questions only on moles from 2009-2013. So you're still doing the past papers, only by content each. I literally have so much to learn and probably wouldn't finish everything due to Physics as Physics right now :'( it's sad. But if worst coms to worst- there are also notes you can use on Physics maths tutor for Chemistry or anywhere. Then watch videos to understand the content. This seems to be going ok so far for me but everything at the moment is taking too much time lol. Don't worry, I'm sure I'm in a worse position that you x
Anyone have any tips on good ways to revise chemistry? I'm really struggling. Plain reading the book isn't working and with making notes I tend to waste a lot of time getting it all neat and pretty and end up not getting much in my head, plus it's really quite late stage to be making notes now. I also didn't want to do papers till later because there aren't many so I want to save them. What do I do???
Spoiler
Type/write notes in your own words. Then do every single past paper.
Make a Microsoft Excel document with all of your exam marks, and have a column for each chapter, where you can add notes for things you do not understand. It really helps.
You can use the papers from the old A level to revise too. Most of the syllabus is the same...just a few tweaks that you can ignore (eg Friedel-Crafts methylation of a benzene ring). The papers are arranged differently, but the questions are very similar.
Thanks for the link But honestly, if someone purely used past papers without learning or reading the content from the book- what grade could they receive as these questions seem almost recycled. Say if I did 20 past papers- could I get maybe grade B through only doing that and looking at mark schemes?