Current Year 10 Thread (2011/2012)

Original post by CharlieBoardman

Hello there! Long time no speak :biggrin:

stick to one conversation in one thread! :tongue:

I shall

Reply 3222

Original post by abccba120

ok ill type that question out : b) Acids also react with bases such as copper oxide.
Describe how a pure sample of copper sulfate crystals can be prepared from copper oxide.(3) :smile:

Hmmmm.... So:
Add sulphuric acid to copper oxide to produce copper sulfate and water. Then evaporate it to produce crystals?

Reply 3223

Original post by shadab786ahmed

Hmmmm.... So:
Add sulphuric acid to copper oxide to produce copper sulfate and water. Then evaporate it to produce crystals?

To be honest i have no idea, in our class we tend to not learn much since there are some idiots in the class who just mess around every lesson so im forced to learn things my self, so if your confident thats the answer then ill learn it, but i honesly have no idea how you got that answer ^^

Reply 3224

MangoFreak

17

Original post by abccba120

To be honest i have no idea, in our class we tend to not learn much since there are some idiots in the class who just mess around every lesson so im forced to learn things my self, so if your confident thats the answer then ill learn it, but i honesly have no idea how you got that answer ^^

That's correct. Evaporating the water leaves you solely with copper sulphate crystals :smile:

Reply 3225

Anyone here be so kind and help me answer this pages questions ? :smile:

question 9a is what im interested in :smile:

thanks so much

(edited 11 years ago)

Reply 3226

Original post by abccba120

To be honest i have no idea, in our class we tend to not learn much since there are some idiots in the class who just mess around every lesson so im forced to learn things my self, so if your confident thats the answer then ill learn it, but i honesly have no idea how you got that answer ^^

Base + Acid ---> Salt + Water eg
Copper Oxide + Nitric Acid ---> Copper Nitrate + Water

Metal Carbonate + Acid ---> Salt + Water + Carbon Dioxide
Sodium Carbonate + Sulphuric Acid ---> Sodium Sulphate + Water + Carbon Dioxide

Ammonia + Acid ---> Ammonium Salt + Water
Ammonia + Hydrochloric Acids ---> Ammonium Chloride and Water

Reply 3227

MangoFreak

17

I feel left out, my school does linear Maths; no exams this year :tongue:

Reply 3228

Mine is linear too! :P but we do it early for the school's league points but they don't tell us that :wink:

Reply 3229

Original post by abccba120

Anyone here be so kind and help me answer this pages questions ? :smile:

question 9a is what im interested in :smile:

thanks so much

I haven't learnt this, but I think it's to do with precipitates... SoRry!

Edit: Actually! If you add an acid to it, the products will depend on what it is! If it produces carbon dioxide then it's sodium carbonate, if it's a hydroxide it'll produce just water (no CO2) if it's neither then it's chloride!

(edited 11 years ago)

Reply 3230

Original post by shadab786ahmed

I haven't learnt this, but I think it's to do with precipitates... SoRry!

Its okay thanks for your help though :smile:

Reply 3231

Original post by abccba120

Its okay thanks for your help though :smile:

Read my edit! :biggrin:

Reply 3232

Original post by shadab786ahmed

Read my edit! :biggrin:

Oh wow i didn't think of that, thank you you've been very helpful :smile:

Reply 3233

Original post by abccba120

Oh wow i didn't think of that, thank you you've been very helpful :smile:

Glad I could help, anything else, you can PM me :smile:

Reply 3234

Okay so ive only got a few question which i dont get so im just going to put them out there if anyone wants to try them :smile:

Question 5c is what im interested in and also the periodic table questgion i get most of it but im afraid i dont have enough content to say to obtain 6 marks.. i know that he left gaps , in order of atomic mass , and modern is proton number etc but is there any others or how do i approach this 6 mark question.. Chem periodic table.jpg

Reply 3235