How is your preperation for Chem Unit 2 ???

[étudiante]

Dats it??? Aur toh kuch nahi nah?

yup! nahin nothing else....

 

[z3r0thunder]

Step #1: Write the balanced GENERAL EQUATION - In order to write this equation, you must decide what the products are. This example problem is an acid-base reaction. The products will be a salt (NaCl) and water. After you have written the reaction, it must be balanced.

Step #2: Write the TOTAL IONIC EQUATION - Here, each reactant and product is studied to determine whether it dissociates in solution. If it is a strong electrolyte, it is written as ions. If it isn't a strong electrolyte it is written as a molecule.

Because NaOH, HCl and NaCl are strong electrolytes they are written as ions. Water is a nonelectrolyte and should be written as a molecule.

Step #3: Write the NET IONIC EQUATION - Each species that does not undergo a change is called a "spectator ion". These species are removed from the equation leaving the balanced net ionic equation

In this example, Na+ and Cl- are spectator ions. They do not undergo change in the reaction. Therefore, they are removed.

 

[schoolation]

well yeah, when they give me an ionic equation and ask me to balance it, what rules I should follow to BALANCE it?

 

[z3r0thunder]

Just get all numbers from each element on each side.
Find the correct numbers by testing random numbers.
Until the correct are found.
You can either do that or use the reactants to find one mole of product and use fractions, then multiply them all to make the fractions from 1/x to 1.

1/2Cl2 + NaBr > NaCl + 1/2Br
Cl2 + 2NaBr > 2NaCl + Br2

There is no other way to balance them.

 

[schoolation]

IONIC EQUATIONS I SAID!

 

[Professor.Phil]

HEY RESPECTED PEOPLE I AM SURE YOU ARE WORKING HARD FOR THE EXAM!!!DONT WORRY!!AS A SENIIOR EXAMINER I WILL HELP YOU!!MY TEAM IS JUST MAIKING UNIT B A LITTLE HARD!!UNIT A AND C ARE VERY EASY!!BUT IF YOU HAVE STUDIED!!SO GET PREPARED!!

 

[z3r0thunder]

IONIC EQUATIONS I SAID!

You mean with Oxidation Numbers trying to balance the Charges?
If possible give me an example.

 

[Shoggaine]

U can show him an example of disproportionation reaction. I think he means that.

 

[xIshtar]

Good luck to everyone today
May the paper go well for everyone!

 

[U stalking ME]

Good luck to everyone today
May the paper go well for everyone!

Thank u and Good Luck to u too
INSHALLAH

 

[PUSHPAK1321]

Exam is at 3:00 right?

 

[U stalking ME]

Exam is at 3:00 right?

yup

 

[Shoggaine]

Its at 5.00 pm in uae.

 

[étudiante]

Its at 5.00 pm in uae.

dats for KSA

 

[DANGERBP]

guyz i really need help with the carbonate stability ?? thermal stability ? n the lattice energy ! i get nothing from both ?? help

 

[Shoggaine]

dats for KSA

Dey jst hav an hour difference....i knw its KSA.

 

[étudiante]

Dey jst hav an hour difference....i knw its KSA.

yup! u think i wont know abt KSA
JK

 

[étudiante]

guyz i really need help with the carbonate stability ?? thermal stability ? n the lattice energy ! i get nothing from both ?? help

Hi Miss Danger

http://www.chemguide.co.uk/inorganic/group2/thermstab.html
try this for carbonates i learnt it from here

 

[Shoggaine]

guyz i really need help with the carbonate stability ?? thermal stability ? n the lattice energy ! i get nothing from both ?? help

For group 1 : The carbonates do not decompose. Only nitrates decompose to nitrites and oxygen except Li.
For group 2 : The carbonates decompose to form its oxide and carbondioxide.
The nitrates decompose to form its oxide, nitrogen dioxide and oxygen. Li acts as same way as Grp 2.

 

[DANGERBP]

Hi Miss Danger

http://www.chemguide.co.uk/inorganic/group2/thermstab.html
try this for carbonates i learnt it from here

haha hey ! =p thanks allot !
umm hey would you happen to know how to find most ionic characters bet elements n most covalents ones ??