Biology; Chemistry; Physics: Post your doubts here!

[Silent Hunter]

This one is also used sometimes:

Potassium -> Please
Sodium -> Send
Calcium -> Charlie
Magnesium -> Monkey
Aluminium -> And
Zinc -> Zebras
Iron -> In
Lead -> Large
Copper -> Cages
Mercury -> Most
Silver -> Securely
Gold -> Guarded

 

[legion]

buh where is hydrogen????

 

[SalmanPakRocks]

yeah Hydrogen is missing.

 

[mintchocolate4567]

I made one too,it goes like Poisonous Sausages Can Make A Zulu Ill, Let Handsome Clever Men Slay Pigeons

 

[Silent Hunter]

Normally this is the reactivity series of metals......... hydrogen is not a metal so isnt included........ BUT we should know that Hydrogen is between lead and copper

 

[legion]

I made one too,it goes like Poisonous Sausages Can Make A Zulu Ill, Let Handsome Clever Men Slay Pigeons

u donot have gold in there otherwise itss way more interesting

 

[legion]

Normally this is the reactivity series of metals......... hydrogen is not a metal so isnt included........ BUT we should know that Hydrogen is between lead and copper

ohhkkk

 

[Silent Hunter]

You may use the previous posted ones........ having hydrogen..... salmanpakrocks one is very good ...... in my first days i used to learn like that

 

[mintchocolate4567]

actually,prescott(our textbook) doesn't even have gold in it

 

[SalmanPakRocks]

actually,prescott(our textbook) doesn't even have gold in it

Use Chemistry Matters, its better than the Prescott one.

 

[mintchocolate4567]

Use Chemistry Matters, its better than the Prescott one.

okay.and which book do u guys use for physics and biology?

 

[SalmanPakRocks]

okay.and which book do u guys use for physics and biology?

for physics use the older version of Physics matters, the charles chew one. I ain't a bio students so wait for someone else to reply.

 

[Silent Hunter]

i used mary jones and jones for bio..... its endorsed book

used federal physics for physics..... and bit of explaining physics

 

[CaptainDanger]

okay.and which book do u guys use for physics and biology?

Biology Matters is there too...

 

[scouserlfc]

http://www.xtremepapers.com/revision/gcse/chemistry/stoichiometry.php
umm in the explanation of neutralization reaction here, there are two equations given. one has the products salt n water. other has salt, water n carbon dioxide gas.can any1 tell me wht are the different circumstances? in both cases bases have reacted with acids.
help plzzzz??? n soon
thanku

Aint this wrong according to almost all books that i have bases are oxides and hydroxides of metals and not carbonates so this is not a neutralization reaction,i think so correct me if im wrong in eg. in books it is given as a charecteristic reaction of acids and in neutralization this is not given so some one might want to see what im saying ??

 

[hassan100]

so wherever carbonates react with acid they form salt, water and CO2?
is this reaction correct? HCl + CaCO3 > H2CO3 + H2O + CO2

btw, thanku

i guess this reaction is not correct whenever a carbonate reacts with an acid, salt,CO2 and water is formed

HCl + CaCO3 > CaCl2+CO2+H20 (u can balance if its not)

 

[hassan100]

Aint this wrong according to almost all books that i have bases are oxides and hydroxides of metals and not carbonates so this is not a neutralization reaction,i think so correct me if im wrong in eg. in books it is given as a charecteristic reaction of acids and in neutralization this is not given so some one might want to see what im saying ??

Scoursfic u r surely right, this is given as one of the characteristics of acids in many book,however u must be aware that Calcium carbonate is also used in liming or reducing the acidty of soil which means it acts as an alkali. So when an acid reacts with with alkali nuetralization reaction occur( do correct me if i am wrong about how it can be nuetralization since in this only salt and water are formed) We must modify the revision notes if its wrong

Hope this helped

 

[scouserlfc]

yeah but lime is a loose word it is also used for CaO and Ca(OH)2 which are mostly used instead of calcium carbonate in the syllabus i think they have given Ca(OH)2 as lime ! But worth exploring this phenomena ill see and tell u soon !

 

[hassan100]

yeah but lime is a loose word it is also used for CaO and Ca(OH)2 which are mostly used instead of calcium carbonate in the syllabus i think they have given Ca(OH)2 as lime ! But worth exploring this phenomena ill see and tell u soon !

yes CuOH2 and CuO are prior to CaCO3 but it is also used widely
And tell me if u find anything regarding this
Thanks

 

[SalmanPakRocks]

but HCL is an Acid and CaCO3 is a base, then that would be neutrilization reaction wouldn't it?