VCE Chemistry Exam - 12/11/19 - Discussion/Questions/Solutions

[Kyokushinkai]

Is it possible for anyone to post up the solutions like the methods section?

Thanks in advance

[angrybiscuit]

What's the A+ gonna be? Any predictions?

Last year you needed 97/120... if everyone found it hard fingers cross it's lower to around 95/120

[3086]

Really hoping its around 93/120

[Friendsfvv]

90-something %.
Exam for me definitely felt longer. Was mostly manageable but that last question took me like 20-30mins to finish writing, leaving me with no time to check rip

Yeah I got 90% something as well.

What did you guys do for whether the results were accurate? I said it wasn't because it wasn't concordant but I doubt that's right haha

[KiNSKi01]

Yo is precision susceptible to bias? There was an MCQ with that as an answer and I had to guess that question because it felt like two options were right

[Jim_Bob]

I said repeating experiments reduces the likelihood of random error

[AnonymooseUser]

I said repeating experiments reduces the likelihood of random error

You're right, but I think it said uncertainty not random error, which I don't think is reduced as it would be consistent in every trial. Correct me if I'm wrong though and it said random error.

[briv01]

Guysss I have a really important question,
How many marks was the last question
After the experimental design?

[Lachlanmartino19]

What did everyone's concentration time graph look like, what increased and dropped?

[emw2101]

Guysss I have a really important question,
How many marks was the last question
After the experimental design?

It was 9 marks 😬 didn’t finish

[Jim_Bob]

You're right, but I think it said uncertainty not random error, which I don't think is reduced as it would be consistent in every trial. Correct me if I'm wrong though and it said random error.

What was ur answer?

[AnonymooseUser]

You're right, but I think it said uncertainty not random error, which I don't think is reduced as it would be consistent in every trial. Correct me if I'm wrong though and it said random error.

What was ur answer?

I chose the 'precise results can be biased' option - not that I know its right. My line of thought was that since precision only refers to how close your measured results are, it doesn't matter if you rigged the experiment because even though the data is not reliable or valid, as long as the results are close together it would still be precise.

[Ironiic]

Did most people struggle finishing? I'm kicking myself because I spent too much time on short answer and completely neglected MC until the last 10 minutes, and had to guess most of it - I'm so annoyed because the questions were what I was comfortable with asking and I basically threw away marks for myself

[bignog2]

What did everyone's concentration time graph look like, what increased and dropped?

Cl- concentration sharply decreased, and as it reached equilibrium Co2+ went up by 1x Cl- went up by 4x, [CoCl4]2- went down by 1x

[Ali Ali]

Did most people struggle finishing? I'm kicking myself because I spent too much time on short answer and completely neglected MC until the last 10 minutes, and had to guess most of it - I'm so annoyed because the questions were what I was comfortable with asking and I basically threw away marks for myself

opposite problem here, spent so much time in MC that i had to either leave blank or guess q7, 8 and 9 despite most of them being pretty free.