Hi good question. Once we found how many moles of Edta reacted it was equal to the moles of AlH206 however we need the moles of Al2(So3)4 You need two Al(H20)6 (as.they only have 1 Al.atom) to make 1 Al2(So3)4 So if i have 1 mole of Al(H20)6 they can only make 0.5 mole of Al2(So3)4. Thats why we divide by 2. If you have 10 apples and it takes 2 apples to make an apple pie how many apple pies can you make from 10 apples. 10 /2 = 5 apple pies.
For question 4.3 when were finding out the total pressure, why do we need to rearrange it? What does the new rearranged equation equal to? Is it kp X mole fractions = total pressure ?
Pleas respond you know question 1.6 can U do e isomer so the cl is on left side of chromium and the other cl is on right side roof chromium intaed of having both cr top and bottom of Cr also when you say for E isomer it has to be oppositie I don't get like where is plane from
This is not like the c=c e z. When it is E isomer all the NH3 are in same plane around metal.ion but the other plane above and below contains Cl. The Z isomer would have at least one Cl above or below and one Cl in the horizontal plane you find the group/ element in both planes
A more technical way to look at it. Is if the all the ligands of the same type have 90 degree angle between them it is cis or Z if the ligands of same type have 180 bond angle between them it is E or trans. So in the example above where the cl is above and below metal.ion they are 180 degree apart so you get trans or e isomer.
@@naga486 Were given the Mr in the question for aluminium sulfate which was 342.3 or somthing like that. Water is 18. The qiestion wanted to know what x was which worked out to 18. I dont think it asked us to wok out the mr of hydrated aluminium sulfate but i might have missed that if it did
![AQA A-Level Chemistry June 2022 Paper 1 [Walkthrough and Tutorial]](http://i.ytimg.com/vi/9dJxNVDB9zY/mqdefault.jpg)
thank you watching this a week before mocks
1:26:55 why divide by 2 and not multiply by 2 for 2 atoms ?
Hi good question. Once we found how many moles of Edta reacted it was equal to the moles of AlH206 however we need the moles of Al2(So3)4 You need two Al(H20)6 (as.they only have 1 Al.atom) to make 1 Al2(So3)4 So if i have 1 mole of Al(H20)6 they can only make 0.5 mole of Al2(So3)4. Thats why we divide by 2. If you have 10 apples and it takes 2 apples to make an apple pie how many apple pies can you make from 10 apples. 10 /2 = 5 apple pies.
@@letsgettothemarks thanks! understand it now
sir at the end of these videos can you add a segment going through bits of examiners report where they find students didn't answer the questions well,
For question 4.3 when were finding out the total pressure, why do we need to rearrange it? What does the new rearranged equation equal to?
Is it kp X mole fractions = total pressure ?
Pleas respond you know question 1.6 can U do e isomer so the cl is on left side of chromium and the other cl is on right side roof chromium intaed of having both cr top and bottom of Cr also when you say for E isomer it has to be oppositie I don't get like where is plane from
This is not like the c=c e z. When it is E isomer all the NH3 are in same plane around metal.ion but the other plane above and below contains Cl. The Z isomer would have at least one Cl above or below and one Cl in the horizontal plane you find the group/ element in both planes
A more technical way to look at it. Is if the all the ligands of the same type have 90 degree angle between them it is cis or Z if the ligands of same type have 180 bond angle between them it is E or trans. So in the example above where the cl is above and below metal.ion they are 180 degree apart so you get trans or e isomer.
1:31:15 you forgot to find the Mr
@@naga486 Were given the Mr in the question for aluminium sulfate which was 342.3 or somthing like that. Water is 18. The qiestion wanted to know what x was which worked out to 18. I dont think it asked us to wok out the mr of hydrated aluminium sulfate but i might have missed that if it did