OCR Gateway Chemistry C4C5C6 - 13/06/13

Original post by cameron262

What do you think I'd need in the specimen paper to get 130UMS or a B (if it was a real exam)?

around 40 ... to be very safe
but i would say borderline C/B will be around 34 tbh

but thats just my 2cents

Ryan

Reply 163

Original post by cameron262

What do you think I'd need in the specimen paper to get 130UMS or a B (if it was a real exam)?

I think 40 marks should be a secure B.

Reply 164

Original post by ryanb97

around 40 ... to be very safe
but i would say borderline C/B will be around 34 tbh

but thats just my 2cents

Ryan

How much do you think I will need for 153 UMS?

Reply 165

Original post by Red Fox

How much do you think I will need for 153 UMS?

ermm....around 60 to be safe

Reply 166

Original post by ryanb97

ermm....around 60 to be safe

Really? I thought it would be around 70 and 60 would be a low A*.

Reply 167

Original post by Red Fox

Really? I thought it would be around 70 and 60 would be a low A*.

last year i think it was only 46 (ish...) out of 75 for an A*

Reply 168

Mathangi

Original post by ryanb97

around 40 ... to be very safe
but i would say borderline C/B will be around 34 tbh

but thats just my 2cents

Ryan

Oh really?! I got 68 on the mock with that specification and my teacher said it was only just a B.

Reply 169

Mathangi

Original post by ryanb97

last year i think it was only 46 (ish...) out of 75 for an A*

But those exams were meant to be a lot easier.

Reply 170

Original post by ryanb97

Hehe...No problem :smile:

What are the qualities of alkali metals?

Reply 171

Original post by andersson

What are the qualities of alkali metals?

qualities meaning properties?

ermm... soft..low density,,,low M and B points

Q. as you go dwn group 7 elements what changes in their M and B points?

Ryan

Reply 172

Original post by ryanb97

qualities meaning properties?

ermm... soft..low density,,,low M and B points

Q. as you go dwn group 7 elements what changes in their M and B points?

Ryan

They increase, which is why chlorine is a gas, bromine is a liquid and iodine is a solid.

What metal would you use for an aeroplane, and why?

Reply 173

Original post by andersson

They increase, which is why chlorine is a gas, bromine is a liquid and iodine is a solid.

What metal would you use for an aeroplane, and why?

alminium..its lightweight

why are metallic bonds strong ?

Reply 174

Original post by ryanb97

alminium..its lightweight

why are metallic bonds strong ?

+ strong and doesn't corrode.

There is a strong attraction between the delocalised 'sea' of electrons and the positive metal ions.

What would have a higher melting point, nickel or silver?

Reply 175

Original post by andersson

+ strong and doesn't corrode.

There is a strong attraction between the delocalised 'sea' of electrons and the positive metal ions.

What would have a higher melting point, nickel or silver?

hngouts....i dont like refreshing :biggrin:

Reply 176

Original post by ryanb97

hngouts....i dont like refreshing :biggrin:

Skype.

Reply 177

Original post by andersson

Skype.

alright

Reply 178

Original post by L'Evil Fish

Original post by ryanb97

Original post by andersson

Original post by BP_Tranquility

At the bottom of page 85 in the CGP revision guide it says "Electrolysis of hydrochloric acid or ethanoic acid produces H2 because they both produce H+ ions". I don't really understand this despite it sounding basic. I might have missed something but can someone explain this please.

Reply 179