2001 CSSA Answer? (1 Viewer)

[me121]

Does anyone have the 2001 CSSA answers for chem?

if you do could you at least post the multiple choice answers?

 

[wrxsti]

hulo, ive done this paper.. no solutions... but im very confident i got them all right . (Checked with teacher)

1. C
2. A
3. D
4. B
5. D
6. C
7. D.
8. B
9.A
10. D
11. D
12. B
13. A
14. A
15. (NOT SURE)

NOTE: 14 is good question

 

[me121]

I got all the same answers as you, except, I have no idea about 14, and for Q15 i though it was B, but i'm not sure about it.

 

[wrxsti]

I got all the same answers as you, except, I have no idea about 14, and for Q15 i though it was B, but i'm not sure about it.

14 is a dilution question

180ppm 10mL of this and adds 90mL of water to this . so volume is now 100mL

ok using expression M1V1 = M2V2

(Expressing everything in litres)

180 x 0.01 = 0.1 x M2

so M2 is 18ppm

NOTE: i had probs with this question as 90mL and why we use 100mL and not 90mL my teacher goes that your new volume is now 100mL so you use it

for 15)

OHHHHHHH... i think i have an idea..
oxygen is a non metal. so acidic oxide?? which doesnt really make much sense but im guessing O2 forms acidic oxide so PH<7 which leaves A
i think?

or if i use my multiple choice trick.... and we pick the common answers in both columns (its pretty complictaaed)
The answer will be "B" so answer is either A and B