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National 5 Chemistry

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Original post by Ethan100
What is a titration calculation ? Would I be able to learn it now ?


Try looking it up on bbc bitesize or on youtube. They aren't really that hard so you should be able to learn it.
Original post by Jay431
Yes, they are very easy. The formula is in the data book


Is that the n1 c1 stuff ? What do they even mean ?
How would I recognise a question is a titration calculation ?
(edited 7 years ago)
Original post by Ethan100
THATS WHAT HALF LIFE MEANS :redface:
I WAS DOING IT WRONG ALL ALONG

THANKS SO MUCH EVE

Wait, what exactly is left ? The percentage is of what ?

THANKS !


ITS OKAY!

Either the mass x element or the strength of the element!
Reply 243
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Jay431
2
Original post by Ethan100
Is that the n1 c1 stuff ? What do they even mean ?
I would I recognise a question is a titration calculation ?


They'll give you a diagram showing a pippete. They'll then give you the concentration and volume of one of the acids and one of the alkalis. They'll then ask you to find the missing concentration or volume of the acid or alkali. It's usually the last question :smile:
Do we need to learn about corrosion and the rusting of iron for the exam. Our teacher only skimmed over it since he was confident its not going to be in the exam. Given the SQA's recent pattern of putting everything that wasn't in previous papers for subjects in the 2016 ones im starting to worry that they might decide to.
Reply 245
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Jay431
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Original post by thomson521
Do we need to learn about corrosion and the rusting of iron for the exam. Our teacher only skimmed over it since he was confident its not going to be in the exam. Given the SQA's recent pattern of putting everything that wasn't in previous papers for subjects in the 2016 ones im starting to worry that they might decide to.


We shouldn't need to. It's not in the course notes.
Original post by Ethan100
Is that the n1 c1 stuff ? What do they even mean ?
How would I recognise a question is a titration calculation ?


just written it out - now downloading the app to send a picture of it.
I think we should all do the same open-ended question, and get our own answers, and once we have all agreed on a suitable answer we will move on to the next one...

Here's the first open-ended question...


image.jpg (Quality of picture isn't great, it's the best I could do)
(edited 7 years ago)
Original post by Jay431
Metal + Acid = Salt + Hydrogen
Metal Oxide + Acid = Salt + Water
Metal Carbonate + Acid = Salt + Water + Carbon Dioxide
Metal Hydroxide + Acid = Salt + Water


What's the significance of remembering these?
Original post by Ethan100
Is that the n1 c1 stuff ? What do they even mean ?
How would I recognise a question is a titration calculation ?


IMG_2449.JPG
Remember the acids we are expected to memorise:

HCl
H2SO4
HNO3
Reply 251
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Jay431
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Original post by SocialStudiesETC
What's the significance of remembering these?


They'll give you one of those questions and then ask you what type of reaction it is, or the products of those reactions
Im guessing we may need to know an example of a radioisotope and say what it is used for
Original post by Lewis H01
I think we should all do the same open-ended question, and get our own answers, and once we have all agreed on a suitable answer we will move on to the next one...

Here's the first open-ended question...


image.jpg (Quality of picture isn't great, it's the best I could do)[/QU

Add to water to see if it is soluble
Heat up to see if the melting/boiling point compares to an ionic/ covalent.
Flame test to see if a colour is given off.
Burn to see and capture the gas given off - CO2 = milky, o2 = relight a glowing splint
add to water and test for pH - ionic - pH7, covalent - <pH7
Original post by Jay431
They'll give you one of those questions and then ask you what type of reaction it is, or the products of those reactions


I usually identify it by the alkali and the acid and the salt or whatever. It's usually clear,
Do we need to know about Photosynthesis ? I know that's Biology but I have about it here in my book but im not sure if its necessary ?
[QUOTE="eve_4342;64892701"]
Original post by Lewis H01
I think we should all do the same open-ended question, and get our own answers, and once we have all agreed on a suitable answer we will move on to the next one...

Here's the first open-ended question...


image.jpg (Quality of picture isn't great, it's the best I could do)[/QU

Add to water to see if it is soluble
Heat up to see if the melting/boiling point compares to an ionic/ covalent.
Flame test to see if a colour is given off.
Burn to see and capture the gas given off - CO2 = milky, o2 = relight a glowing splint
add to water and test for pH - ionic - pH7, covalent - <pH7


Good answer, if that came up I'd be happy because it's literally open-ended and not bloody stupid like some of them.
Original post by SocialStudiesETC
What's the significance of remembering these?


Just write the equation and see what the end products are - I find it easier than remembering.
What is a flame test ? Is that got anything to do with the colours in the data booklet ?
[QUOTE="SocialStudiesETC;64892813"]
Original post by eve_4342


Good answer, if that came up I'd be happy because it's literally open-ended and not bloody stupid like some of them.


Haha yeah but no doubt the SQA will do a crappy one this year !:biggrin:

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