GCSE OCR 21st Century Triple Science (CBP1-7) Thread

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Reply 1120

cupcakes16

Original post by Sulfur

Apparently so! :smile:

I made such stupid mistakes :frown:

If my coursework is an A or A* and i think i did well in biology.
What grades would i need in chemistry and physics to get an A overall.

Thanks

Reply 1121

Sulfur

Original post by fewik

How many people put AB were similar and CD were different?
And how many people wrote magnesium sulfate and chloride for the last question?

:frown:

Nope for first :frown:

Sodium chlorice, NaCl
Sodium sulphate Na₂SO₄

(edited 9 years ago)

Reply 1122

username1344042

Original post by fewik

How many people put AB were similar and CD were different?
And how many people wrote magnesium sulfate and chloride for the last question?

:frown:

I did those :tongue:

Reply 1123

Sulfur

Original post by cupcakes16

I made such stupid mistakes :frown:

If my coursework is an A or A* and i think i did well in biology.
What grades would i need in chemistry and physics to get an A overall.

Thanks

The electrons seems fine as well!

Low-mid As on average

Reply 1124

superdarklord

The ABCD question was worded so weirdly I looked over it like three times and I'm 50/50 even now. Tbh it was the worst question made little sense.

Rest of the exam was great though :smile:

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Reply 1125

cupcakes16

Original post by Sulfur

The electrons seems fine as well!

Low-mid As on average

Thanks, was an answer to a question proton and electron - it was an option question with 2 boxes.

Reply 1126

cupcakes16

What was the C6 six marker question?

Reply 1127

Sulfur

Original post by cupcakes16

Thanks, was an answer to a question proton and electron - it was an option question with 2 boxes.

Positive - copper ion
Negative - electron

Sorry I've just reread your previous question, for an A overall (seeing as your coursework would be an A-A*) you'd need mid Bs-low As.

Reply 1128

cupcakes16

aarghhh, i didn't read the question properly.
I put proton and electron :frown:

Reply 1129

ToLiveInADream

I have a secure A* in the coursework, I'm sure I got an A* in unit 1 as I remember feeling soooo good after, I think I scraped an A* for today's exam...so what do I need for C7 to get an A* overall? Obviously I'm going to aim as high as I can, but C7 is the hardest 7 for me so realistically if I get an A...will I still get an A* overall?

Reply 1130

ToLiveInADream

OOH! Forgot about this question. It's about the Cl- one, what did everybody get? For the second part of the question I put Cl- ion and I can't remember the metal but 3+ ion

Reply 1131

superstar16

i really want an A* overall for additional science. i have a really high A* in coursework and i think i would get about 45 for biology and 34 for chemistry and if i get about 40 for physics, can i still get an A* overall??

(edited 9 years ago)

Reply 1132

fewik

Original post by Sulfur

Exactly what I said.

weren't a and b similar because they're both acids so they give a low ph reading and both hydrochloric acid and sulfuric acid produce hydrogen when reacting with metals.
also c was different because Hcl wouldn't produce a precipitate when sulfuric acid would. And vice versa for d (sulfuric acid wouldn't produce a precipitate with silver.

What were your observations?

Reply 1133

superstar16

[INDENT]i really want an A* overall for additional science. i have a really high A* in coursework and i think i would get about 45 for biology and 34 for chemistry and if i get about 40 for physics, can i still get an A* overall?? [/INDENT]

Reply 1134

Sulfur

Original post by fewik

They were all worth 3 marks each, so 6 overall which makes me wonder if they'd accept your opinion? `

I said that A was different because they'd produce a different pH because they would be of different acidity (they both can't be 1.51, 1.90 etc). I also said B was different because HCl would react faster than H2SO4.

For C and D I just wrote "They produce a white precipitate when they react". I had no idea.

Reply 1135

cupcakes16

Can anyone remember what the C6 six marker was?

Reply 1136

DDan123

The ABCD question was 6 marks so I guess if you didn't write which ones were similar and different correctly, that's all 6 marks gone??

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Reply 1137

cupcakes16

Original post by DDan123

The ABCD question was 6 marks so I guess if you didn't write which ones were similar and different correctly, that's all 6 marks gone??

Posted from TSR Mobile

Yep

Reply 1138

Sulfur

Original post by cupcakes16

Yep

Original post by DDan123

The ABCD question was 6 marks so I guess if you didn't write which ones were similar and different correctly, that's all 6 marks gone??

Posted from TSR Mobile

Not necessarily - we don't know the mark scheme and it appears that you could give evidence for both sides.