Chemistry: Post your doubts here!

[Sariya Khan]

Can't the hydroxyl group react directly with cyanide ion?

 

[The Sarcastic Retard]

Can't the hydroxyl group react directly with cyanide ion?

I havent seen any reaction like this till now.

 

[Sariya Khan]

I havent seen any reaction like this till now.

Hahah so it doesn't. Thanks ^_^

 

[Eugene99]

How does, acidifying the pool water, not let the OCl to break down?

 

[Eugene99]

Please explain

 

[Eugene99]

Why is it A?

 

[The Sarcastic Retard]

View attachment 59888
Please explain

B
CH3COOH and C3H7OH are products of its hydrolysis.
Do esterification and see if u get the compund asked in question.

 

[The Sarcastic Retard]

View attachment 59889
Why is it A?

Make the monomer of A. You will get 1,1 - dichloroethene (Cl2)C=CH2

 

[Eugene99]

B
CH3COOH and C3H7OH are products of its hydrolysis.
Do esterification and see if u get the compund asked in question.

Make the monomer of A. You will get 1,1 - dichloroethene (Cl2)C=CH2

thanks

 

[qwertypoiu]

How does, acidifying the pool water, not let the OCl to break down?View attachment 59887

The question says how to keep concentration of HOCl to maximum.
The equilibrium is:

OCl- + H2O <---> OH- + HOCl

Whichever of the choices keeps the above equilibrium shifted to the right is the correct answer.

Adding the acid will remove OH- ions and thus shift equilibrium to the right, so it is the correct answer.

 

[Eugene99]

The question says how to keep concentration of HOCl to maximum.
The equilibrium is:

OCl- + H2O <---> OH- + HOCl

Whichever of the choices keeps the above equilibrium shifted to the right is the correct answer.

Adding the acid will remove OH- ions and thus shift equilibrium to the right, so it is the correct answer.

oh right! thank you

 

[ashcull14]

Look at this.
I compared 1st and 4th experiment.
View attachment 59872
In ms its opposite of what i did.
denominator part is numerator and vice versa.

oo thanks

 

[The Sarcastic Retard]

How to determine the common oxidation states of transition elements?
I am heck confused. I have seen questions asking valencies. So any help?

 

[Mohammed Elatta]

How to determine the common oxidation states of transition elements?
I am heck confused. I have seen questions asking valencies. So any help?

Most common oxidation state is +2 but the transition elements at the start of the row oxidation state involves all of the electrons present in the 4s and 3d subshells , however from iron onwards the maximum oxidation state becomes +2 since the 3d electrons become relatively harder to remove. for example vanadium which is a transition element at the start of the row can have all of its electrons removed from the 4s and 3d subshell therefore can be +1 . +2 , +3 , +4 and even +5. I might be mistaken correct me if i'm wrong though.

 

[cute97]

Nope I'm giving 11 and 21

When is your practical exam, and which variant are you doing?

 

[Saad the Paki]

When is your practical exam, and which variant are you doing?

I'm not quite sure it's either 31 or 32 but I haven't received my statement of entry yet so I don't know for sure.

 

[cute97]

I'm not quite sure it's either 31 or 32 but I haven't received my statement of entry yet so I don't know for sure.

Oh okay, our school gave it already, I will be doing v31, when you come to know when is your practicals and which variant please tell me Where do you live?

 

[cute97]

sfhn_128 Here you go

 

[sfhn_128]

sfhn_128 Here you go

thank you!

 

[Eugene99]

How do I know which one is a redox reaction? (Ans is B)