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lol i dont even know how to tag ppl
I have to reply to their messages instead.
I have to reply to their messages instead.
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just put a @ before the members name if you want to taglol i dont even know how to tag ppl
I have to reply to their messages instead.
Thanksjust put a @ before the members name if you want to tag
WelcomeThanks
Right, but then what could it be?Hydrogen bonding only takes place with Fluorine, Oxygen and Nitrogen.
Right, but then what could it be?
Wow thanks a lot for this, it really helped me.The answer to question 37 is D and here's why.
Each of the 3 hydrocarbons contain double bonds, the addition of hot conc. kmno4 reiterates the fact that these are alkenes.
Hot conc. kmno4 has alkenes undergo strong oxidization, that is after the diols place themselves across the double bonds, they can be oxidized to COOH, CHO, CO or CO2.
For these specific 3 hydrocarbons you want to be able to figure out what products will form after bond cleavage at the double bonds.
Here's how you're supposed to approach it:
Hydrocarbon 1 --> View attachment 52200
Hydrocarbon 2 --> View attachment 52201
Hydrocarbon 3 --> View attachment 52203
If the carbon partaking in the double bond is bonded to one hydrogen, it will oxidize completely to an aldehyde. This question specifically states that we want ketones in " both " which means there has to be two products with a ketone group. Hydrocarbon 1 is the only one that supports what the question is asking, so your answer has to be D.
Hope that helped.
Wow thanks a lot for this, it really helped me.
I have a question though. Wouldn't the aldehydes formed me further oxidised to carboxylic acids?
Also you said, "they can be oxidized to COOH, CHO, CO or CO2." Under what conditions is CO formed? Thanks.
Alright thank youOh sorry CO was meant to indicate a ketone formed, and yes the aldehydes can be oxidized further to COOH.
very well explained thnk u so mchTBH I wasn't sure about this but this is how I thought through this:
A is definitely wrong due to Le Chatelier's principle.
C seems to be wrong, we never studied Contact Process involving such catalysts.
D seemed wrong too, we've been taught the process is carried out at 450 degrees.
So I would select B.
Examiner Report on this Question:
"A question on the reaction conditions of the Contact process has not previously been asked, and Question 19 was set to test this. The reason why a temperature as high as 450 o C is used was only properly understood by 39% of candidates (the key B): at lower temperatures the V2O5 catalyst is ineffective. Curiously, given that the reaction is an exothermic one such that lower temperatures could be expected to move the equilibrium in the direction of the SO3 product, 32% chose distractor A believing that this would not be the case."
nice diagrams THNK U VERRY MUCHThe answer to question 37 is D and here's why.
Each of the 3 hydrocarbons contain double bonds, the addition of hot conc. kmno4 reiterates the fact that these are alkenes.
Hot conc. kmno4 has alkenes undergo strong oxidization, that is after the diols place themselves across the double bonds, they can be oxidized to COOH, CHO, CO or CO2.
For these specific 3 hydrocarbons you want to be able to figure out what products will form after bond cleavage at the double bonds.
Here's how you're supposed to approach it:
Hydrocarbon 1 --> View attachment 52200
Hydrocarbon 2 --> View attachment 52201
Hydrocarbon 3 --> View attachment 52203
If the carbon partaking in the double bond is bonded to one hydrogen, it will oxidize completely to an aldehyde. This question specifically states that we want ketones in " both " which means there has to be two products with a ketone group. Hydrocarbon 1 is the only one that supports what the question is asking, so your answer has to be D.
Hope that helped.
The answer to question 37 is D and here's why.
Hydrocarbon 3 --> View attachment 52203
If the carbon partaking in the double bond is bonded to one hydrogen, it will oxidize completely to an aldehyde. This question specifically states that we want ketones in " both " which means there has to be two products with a ketone group. Hydrocarbon 1 is the only one that supports what the question is asking, so your answer has to be D.
Hope that helped.
Also,
What could be the bonding between C02 and H20 in fizzy drinks? is it Hydrogen bonding?
Equilibrium means that the rate of forward reaction is equal to the rate of backward reaction.
So they increased the temperature and still want it to be in Equilibrium?
When the temperature is increased the temperature more of products will be formed since forward reaction is exothermic....but since they want equilibrium both sides increase...
Did I get it right ?
Why are BOTH increasing?
Thank you for your help!
i) mass of kerosene used = 8195 x 10.8 = 88506 kg = 88.506 tonnes
I'm getting a bit confused I think.A <--> B
One way to think of it is that at higher temperatures, A and B both experience an increase in energies.
So a larger portion of A is able to overcome the activation energy of the forward reaction to form B.
At the same time, a larger portion of B is able to overcome the activation energy of the backward reaction to form A.
Therefore, both forward and backward reaction rate increases when temp increases. But they increase to different extents (depending on which direction is exo or end0) , leading to equilibrium shifts.
Check here:Need A2 INORGANIC chemistry notes.ASAP!!!
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