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National 5 Chemistry 2016/17

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Original post by philipthegreat

What did you put for SO2 gas react with water to form an acid?

What was the question again? Was it about the ph?

Please excuse some of the pencil marks - I got these sent to me from a friend. :smile:

:smile:

Ok this is what I got
1.D
2.C
3.A
4.D
5.A
6.B
7.C
8.B
9.A
10.A
11.D
12.C
13.C
14.B
15.D
16.C
17.A
18.B
19.A
20.C

Original post by Amelie240102

What was the question again? Was it about the ph?

Yeah😕

Original post by Amelie240102

What was the question again? Was it about the ph?

Yes I put as the sulfur dioxide dissolves, the pH of the water decreases and the water becomes increasingly acidic

Original post by Josh broadfoot

Yes I put as the sulfur dioxide dissolves, the pH of the water decreases and the water becomes increasingly acidic

Yeah I said that when an acid is diluted with water, it's acidity decreases and ph moves towards 7.

username3164376

Original post by philipthegreat

Really good!! It didn't go into depth about anything😀

I know I was so pleased

username3164376

Original post by Amelie240102

Yeah I said that when an acid is diluted with water, it's acidity decreases and ph moves towards 7.

It's acidity increases I thought

Original post by Amelie240102

Yeah I said that when an acid is diluted with water, it's acidity decreases and ph moves towards 7.

It wouldn't move towards 7 as the pH of pure water is 7 therefore if it is becoming increasingly acidic it would move away from 7 below it

What did you guys put for the last open-ended question?

Original post by Amelie240102

Yeah the multiple choice was pretty good. What's your next exam?

English, you?

Original post by bethanyharris

English, you?

Same :

Original post by Josh broadfoot

It wouldn't move towards 7 as the pH of pure water is 7 therefore if it is becoming increasingly acidic it would move away from 7 below it

Idk then, I was thinking about the dilution of acids.

Original post by Amelie240102

Yeah I said that when an acid is diluted with water, it's acidity decreases and ph moves towards 7.

I said SO2 was covalently bonded so it had no charge when it dissolves in water it gained hydroxide and hydrogen ions and Became acidic😕 I know it doesn't make sense

(edited 6 years ago)

Original post by Sc49494

Same however I got A for 4 because I misread the question- I think full marks for you, and 19 for me in this section otherwise. Kicking myself.

I'm so happy😁😁

Anyone else accidentally miss out the label the diagram of the electrolysis thing?

Original post by Notkeen

Anyone else accidentally miss out the label the diagram of the electrolysis thing?

Nearly did!! I had like 5 min Left and i looked At the back of the paper and it had an extra diagram of it and i was like WHAT IS THAT? So i quickly did it

Original post by philipthegreat

I'm so happy😁😁

Well done!! How'd you do in section two do you think?

Original post by Notkeen

Anyone else accidentally miss out the label the diagram of the electrolysis thing?

Haha it took me forever to actually work out what to do!

Original post by philipthegreat

Nearly did!! I had like 5 min Left and i looked At the back of the paper and it had an extra diagram of it and i was like WHAT IS THAT? So i quickly did it

I know! How did you label it? :biggrin:

:biggrin:

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