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OCR Chemistry AS Depth Thursday 23rd 2019 Unofficial Markscheme
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TSR George
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#1
Upload all your thoughts and answers here for the as chemistry depth paper from today. What did you lot think of it?
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ben.ashmore
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#2
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#2
What did you get for X in SrCl2 x H2O? I got 5.8 when not rounding any other calcs but 5.9 when rounding. I went with 5.8 in the end. Overall I felt like it was a good paper, the 6 markers were nice too
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Ebonyw02xox
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#3
How many grams of hexan-1-ol did you all get? And what did you put for the fertilisation question about mgNo3?
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ben.ashmore
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#4
Yeah at first I rounded 5.9 to 6 but then saw the question asked for 2sf so I assumed you were supposed to get a decimal
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gracehwd
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#5
(Original post by ben.ashmore)
Yeah at first I rounded 5.9 to 6 but then saw the question asked for 2sf so I assumed you were supposed to get a decimal
Yeah at first I rounded 5.9 to 6 but then saw the question asked for 2sf so I assumed you were supposed to get a decimal
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danyy2121
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#6
I got 13.43 but forgot to divide it by 2 because of h2o
(Original post by gracehwd)
Uhh anyone else get 11?
Uhh anyone else get 11?
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bzz567
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gracehwd
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#8
Why did you divide by 2?
Don’t you just divide the mass by 18 then by the smallest one to get the ratio
Don’t you just divide the mass by 18 then by the smallest one to get the ratio
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james161717886
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#9
Dfffggv
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#10
TheV1llain27
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#11
Pav2001
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#12
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#12
(Original post by Ebonyw02xox)
How many grams of hexan-1-ol did you all get? And what did you put for the fertilisation question about mgNo3?
How many grams of hexan-1-ol did you all get? And what did you put for the fertilisation question about mgNo3?
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james161717886
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#13
dylan_sian
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#14
dylan_sian
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#15
(Original post by james161717886)
What did u get for the first question
What did u get for the first question
or the abundance one forgot which was first
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thekidwhogames
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#16
Alcohol 8.16
Separating funnel and distill
Standard solution
60cm3
35.8cm2 or somerhing
86 for isotope
5. 8 for x
Mass of zinc like 26g I can't remember just plug formula this is the standard solution q
Nickel catalyst
Decolorises from orange to colorless
Major is when the H goes TO c connected to most h
Metallic bonding explanation
Observation is lower pH and takes more time to get the fizzing and metal dissolves (less vigorous)
Separating funnel and distill
Standard solution
60cm3
35.8cm2 or somerhing
86 for isotope
5. 8 for x
Mass of zinc like 26g I can't remember just plug formula this is the standard solution q
Nickel catalyst
Decolorises from orange to colorless
Major is when the H goes TO c connected to most h
Metallic bonding explanation
Observation is lower pH and takes more time to get the fizzing and metal dissolves (less vigorous)
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itskxmil
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#17
danyy2121
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#18
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#18
I got 86.1 but I doubt it’s right but I got it right when I put in the formula . But I used trial and error as my last minute resort 😂😂😂😂
(Original post by dylan_sian)
the definition of relative atomic mass?
or the abundance one forgot which was first
the definition of relative atomic mass?
or the abundance one forgot which was first
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Esmesgirl
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#19
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#19
I had no idea. Not something I revised, so I couldn't answer it. I ran out of time to look at it properly to guess.
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Esmesgirl
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#20
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#20
Wasn't it about definition of an isotope? There was the isotope abundance question on Sr as well.
(Original post by dylan_sian)
the definition of relative atomic mass?
or the abundance one forgot which was first
the definition of relative atomic mass?
or the abundance one forgot which was first
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