If you have any question on chem p6 im ready you guys. Don't Worry!!

[Lost_Life]

yes its correct

 

[JimmyCarter]

no , a paper had a question saying suggest a suitable solvent for water-soluble fruit coloring's... i put ethanol,, but the answer is water

they kind of help you, you always use a solvent that the substance to do chromatography to dissolves in. because its the main concept.

 

[Lost_Life]

they kind of help you, you always use a solvent that the substance to do chromatography to dissolves in. because its the main concept.

yeah i realized that..

 

[jaida al hinai]

no , a paper had a question saying suggest a suitable solvent for water-soluble fruit coloring's... i put ethanol,, but the answer is water

aha

 

[JimmyCarter]

goodluck

 

[kboss]

no , a paper had a question saying suggest a suitable solvent for water-soluble fruit coloring's... i put ethanol,, but the answer is water

its quite obvious
the question says the fruit colorings are soluble in water so water must be the solvent.
as a solvent is a substance which dissolves a solute.
the solute there being the fruit colorings and since they are soluble in water they would dissolve in water.
hence water is the solvent.
hope u got it!!!

 

[Lost_Life]

how do we solve this

 

[jaida al hinai]

i dont get hw do u find the equations in electrolysis??

 

[Lost_Life]

is this the right answer???????

 

[Lost_Life]

i dont get hw do u find the equations in electrolysis??

same!!!!
i dnt get how to write ionic equations! :,(

 

[JimmyCarter]

View attachment 10406 is this the right answer???????

so as to avoid liquid suck back, or so that the glass wont break.

 

[JimmyCarter]

heat is applied under the mineral wool

so as to avoid liquid suck back, or so that the glass wont break.

 

[jaida al hinai]

same!!!!
i dnt get how to write ionic equations! :,(

exactly!!!!

 

[Lost_Life]

no i mean the positions of aluminium oxide and ethanol

 

[Lost_Life]

exactly!!!!

well, im guessing its related to the positions if the electrde (anode(oxidation) ) etc...

 

[JimmyCarter]

i dont get hw do u find the equations in electrolysis??

if you know the products in each electrode then the equations become easy. first here are some basics you need to know. 1- the ions that are less reactive deposite in the electrodes e.g if we have sodium ions and Cu ions , then the Cu will deposite because its less reactive, reactive ones tend to stay as ion form.
2- Anions go to the Anode and Cations go to the Cathode.

lets say Aluminum deposited in the cathode. we know that the valency of Al is 3+ this means that it needs to lose 3 electrons to change from an ion to an atom. so whn it goes to the cathode it gives up these elctrodes and become an element, so therefore the equation becomes Al3+ 3e------> Al

and if chlorine goes to the anode, we know chlorine has a valency of -1 so it needs to gain one electron to become a gas. the equation thus becomes Cl-1 -------> Cl + e

 

[JimmyCarter]

is that clear ??

 

[JimmyCarter]

no i mean the positions of aluminium oxide and ethanol

yes its correct

 

[jaida al hinai]

well, im guessing its related to the positions if the electrde (anode(oxidation) ) etc...

i got it , u need 2 know the cations nd anions nd if the ion is +ve it goes 2 the cathode nd if its -ve it goes 2 the anode

 

[jaida al hinai]

is that clear ??

yup.... thx