AQA GCSE - Unit 3 (P3,B3,C3) New specification papers.

I have i've finished all of it for: p3,c3 and b3

also done b1 (as i'm resitting)

WTF!!! Neg rep for this? get a life

(edited 11 years ago)

Reply 701

Putting them in order of difficulty i would say: P3-C3-B3

*starting with the most difficult

(edited 11 years ago)

Reply 702

Original post by Jadoreidior

Has anyone finished their unit 3 revision?

Posted from TSR Mobile

Yep, just reading over it again.
Just like Captain my order is P3-C3-B3. Also have to do C2 as I was not entered for it before :angry:

Reply 703

Original post by lolface32

Yep, just reading over it again.
Just like Captain my order is P3-C3-B3. Also have to do C2 as I was not entered for it before :angry:

brains think alike = we're clever :cool:

Reply 704

BI0

7

In order of difficulty I'd agree with you guys. Biology isn't as confusing but it's a lot to remember though.

Random Q if anyone wants it;
How do you correct someone's eyesight who is short sighted (same question for long sighted as well?)

Reply 705

Original post by Captain Anonymous

brains think alike = we're clever :cool:

yaah we are!!!

Reply 706

Original post by BI0

In order of difficulty I'd agree with you guys. Biology isn't as confusing but it's a lot to remember though.

Random Q if anyone wants it;
How do you correct someone's eyesight who is short sighted (same question for long sighted as well?)

Short sighted would = Diverging lens
Long sighted would = Converging lens :biggrin:

Reply 707

Original post by BI0

In order of difficulty I'd agree with you guys. Biology isn't as confusing but it's a lot to remember though.

Random Q if anyone wants it;
How do you correct someone's eyesight who is short sighted (same question for long sighted as well?)

For short sighted you would use a concave/diverging lens and for a long sighted person you would use a converging/convex lens :colondollar:

Reply 708

what is circluar motion?

Reply 709

Explain why the reactivity increases going down group 1 (alkali metals)?

Reply 710

BI0

7

Original post by Captain Anonymous

what is circluar motion?

Circular motion is when an object moves in a circle due to a constant acceleration towards the centre (caused by the centripetal force)

Original post by Captain Anonymous

Explain why the reactivity increases going down group 1 (alkali metals)?

In group one elements, as we go down the group the period number of the elements increases. This means there are more energy levels for elements going down the group. Elements in group one with more shells will have the outer electron further away from the nucleus, and thus there will be a smaller attractive force. This means electrons are more easily lost on elements going down the group, and so they are more reactive.

^I've always hated answering that question XD I can never word it right...

How can you soften hard water?

Reply 711

Original post by BI0

Circular motion is when an object moves in a circle due to a constant acceleration towards the centre (caused by the centripetal force)

In group one elements, as we go down the group the period number of the elements increases. This means there are more energy levels for elements going down the group. Elements in group one with more shells will have the outer electron further away from the nucleus, and thus there will be a smaller attractive force. This means electrons are more easily lost on elements going down the group, and so they are more reactive.

^I've always hated answering that question XD I can never word it right...

How can you soften hard water?

By adding sodium carbonate, you would get a reaction with the Mg2+ and Ca2+, which forms a insoluble precipitate.

Reply 712

Why are carboxylic acids called 'weak' acids?

Reply 713

or by using an ion exchange column

Reply 714

Original post by Captain Anonymous

or by using an ion exchange column

Oh yeah

Reply 715

Original post by lolface32

Why are carboxylic acids called 'weak' acids?

becuae they atoms do not ionise completely, they only form a few H+ ions

Reply 716

Original post by BI0

Circular motion is when an object moves in a circle due to a constant acceleration towards the centre (caused by the centripetal force)

In group one elements, as we go down the group the period number of the elements increases. This means there are more energy levels for elements going down the group. Elements in group one with more shells will have the outer electron further away from the nucleus, and thus there will be a smaller attractive force. This means electrons are more easily lost on elements going down the group, and so they are more reactive.

^I've always hated answering that question XD I can never word it right...

How can you soften hard water?

well done, with both answers. You worded the answer perfectly fine :colone:

Reply 717

How to you carry out a titration experiment (4marks)

Reply 718