Edexcel A LEVEL 2021 ASSESSMENTS by Rich Warburton https://padlet.com/chemistry10/242xqzdiclixvs4f Questions & Answers en-us 2021-04-23 11:22:39 UTC 2026-02-12 04:01:31 UTC hello@padlet.com https://padlet-uploads.storage.googleapis.com/1154638798/9ce75385be21529863b0e88fa6c94e31/RK_DT_ContentCourses_V03_04_Chemistry.png https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1456095349 2021-04-25 11:06:47 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1456095349 for b) i think its carbon particulates but surely unburned hydrocarbons would look the same? https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1456187082 2021-04-25 12:20:19 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1456187082 https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1456213993 not 100% sure i was right so submitted it.]]> 2021-04-25 12:41:54 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1456213993 https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1456366231 Mainly need help with the polymer question but wouldn't mind help with the question bellow it.]]> 2021-04-25 14:35:54 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1456366231 Question 1) c https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1489902051 Hi, Im not really sure how I would answer this question. Thanks.]]> 2021-05-04 14:39:09 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1489902051 Questions 7b)ii https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1489923839 In the diagram it appears the B-O-H Bond is 90 degrees, why is it 104.5? ]]> 2021-05-04 14:43:06 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1489923839 Hi, could you go through questions 9b ( buffer solution question) I got 0.451g but Im not sure if its correct. https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1493763454 2021-05-05 13:37:47 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1493763454 Hi how would you answer this type of question thank you https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494550124 2021-05-05 16:09:16 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494550124 just wanted to check my answers to this one https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494552076 2021-05-05 16:09:38 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494552076 https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494567957 2021-05-05 16:12:40 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494567957 https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494605751 with this question I don't get this part]]> 2021-05-05 16:19:54 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494605751 Question 3 https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494752479 Question 4]]> 2021-05-05 16:49:46 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494752479 Question 5 https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494766954 Please could you go through this one- I really do not understand it!

]]> 2021-05-05 16:52:42 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1494766954 unsure how to phrase this or what the answer even is https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505482147 2021-05-08 20:37:53 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505482147 https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505482648 not sure why student is incorrect]]> 2021-05-08 20:38:30 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505482648 Hi, I am not entirely sure whether to mention entropy of system, surroundings or both, and how to communicate these thoughts into an answer https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505483265 2021-05-08 20:39:08 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505483265 Q3b https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505487523 2021-05-08 20:43:43 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505487523 question 4 iv https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505488412 Hello, im not sure what i need to list]]> 2021-05-08 20:44:38 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505488412 Question 4 b https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505489151 could you please explain how to answer this question in just 3 marks - i feel like i would end up writing a whole essay for this question]]> 2021-05-08 20:45:26 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505489151 how do you tackle questions like these without overcomplicating which electrons go where. I always have to spend too much time on these questions just to get all the marks https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505490194 2021-05-08 20:46:30 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505490194 question 2 ii https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505492102 2021-05-08 20:47:47 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505492102 question 2 iii https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505493377 2021-05-08 20:49:06 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505493377 Hello how do you answer this https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505494682 2021-05-08 20:50:29 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505494682 i cant find the 3rd mistake and its modification. Also, I am not sure if the 2 mistakes & modifications I did get are Correct. Thanks! https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505497697
i got 2 mistakes:
1) weak acid (ethanoic acid) ; should be suitable strong acid like sulfuric acid or hydrochloric acid

2) ammeter ; should be a high-resistance voltmeter


]]> 2021-05-08 20:53:51 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505497697 question 10 spans 2 pages, so in 2 posts https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505499731 2021-05-08 20:56:01 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505499731 overwhelmed by 10c - how do you do it!? https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505500197 2021-05-08 20:56:30 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505500197 Hi, how do you answer this?? https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505501456 2021-05-08 20:57:52 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505501456 not sure what i am supposed to be thinking about to answer this - help, please! https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505502207 2021-05-08 20:58:39 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505502207 not sure https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505505067 2021-05-08 21:01:55 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505505067 also not sure about this https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505505184 2021-05-08 21:02:04 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505505184 How do you phrase this? I know it's to do with shining a polarised plant of light on each enantiomer sample, which should rotate the plane of polarised light in opposite directions, but that seems to long-winded for a 1 marker. https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505505481 2021-05-08 21:02:23 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505505481 Not sure about this one help ! https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505506912 2021-05-08 21:04:07 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505506912 I know the answer, but I am not sure how to write my response https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505507414 2021-05-08 21:04:34 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505507414 This question gave me a headache, please explain! https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505507957 2021-05-08 21:05:16 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505507957 Hey! Could you please help with the calculations for these, thanks! https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505508620 2021-05-08 21:06:06 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505508620 how do you do this logically? i dont know where to start! i tried retrosynthesis, but it felt more difficult going from product to reactant https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505509651 2021-05-08 21:06:58 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1505509651 Hi, I don't know if this question requires transition metal knowledge or are they make it look confusing, but its just a question about equilibriums and entropy https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1506411250 2021-05-09 13:28:59 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1506411250 i got +5 as final oxidation state, but i dont know if that's correct https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1506424701 2021-05-09 13:42:10 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1506424701 Is my answer right and worth all 4 marks? also, is there any way i can cut down how much i write because it took me 5.5 minutes to write the 4 marker - thanks!! https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1506431796 hi rich!

this is what i wrote for my answer: 

1. they are d-block elements because the valence shell electrons of scandium (*insert correct electron config*) and vanadium (*insert correct electron config*) are located in 3d subshells

2. they are not transition metals because transition metals are elements that form one or more stable ions with partially-filled d orbitals

3. scandium only forms 1 stable ion: Sc3+ that has electron configuration of *insert correct electron config*, so has completely empty d orbitals of its 3d subshell

4. zinc only forms 1 stable ion: Zn2+ that has electron configuration of *insert correct electron config*, so has completely filled d orbitals of 3d subshell]]> 2021-05-09 13:49:45 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1506431796 https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1527090994 hi how do you answer this question? Thanks ]]> 2021-05-15 14:07:48 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1527090994 https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1527094800 hi how do you answer this question? Thanks ]]> 2021-05-15 14:11:27 UTC https://padlet.com/chemistry10/242xqzdiclixvs4f/wish/1527094800