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    (Original post by alow)
    You want 1M of the ion.
    So the 392g represent 2M of Cr3+ and for a standard solution, we need a 1M of Cr3+ so 392/2 ?

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    (Original post by PlayerBB)
    So the 392g represent 2M of Cr3+ and for a standard solution, we need a 1M of Cr3+ so 392/2 ?

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    I think so, yeah.
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    Name:  ImageUploadedByStudent Room1465313691.431490.jpg
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    Bit messy but how many marks would this be


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    Can someone help me with (c), I can't figure it out ?
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    (Original post by Supermanxxxxxx)
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    Bit messy but how many marks would this be


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    One
    1. You gained the first mark
    2. You shouldn't leave the receiver like this with a large gap between the delivery tube and the receiver and you should include a small opening within the tube itself and it should be after the condenser to prevent the build up of pressure
    3. You lost the third mark because you didn't include the thermometer in which the thermometer bulb should oppose the opening of the condenser and also you didn't includea source of heating as an electric heater
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    (Original post by PlayerBB)
    Can someone help me with (c), I can't figure it out ?
    Is the answer d


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    (Original post by Supermanxxxxxx)
    Is the answer d


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    Yeah! How ? Is it because when the propanoyl chloride reacts with water, it produces propanoic acid + HCl gas which cause the solution to become more acidic than propanoic acid alone ?
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    (Original post by PlayerBB)
    Yeah! How ?
    Acyclovir chlorides along with water will produce a carboxylic acid and hcl
    And hcl is a strong acid which can dissociate fully


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    (Original post by Supermanxxxxxx)
    Acyl chlorides along with water will produce a carboxylic acid and hcl
    And hcl is a strong acid which can dissociate fully


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    (Original post by Supermanxxxxxx)
    Acyclovir chlorides along with water will produce a carboxylic acid and hcl
    And hcl is a strong acid which can dissociate fully


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    Ah thanks but isn't it HCl gas that is produced and it should evaporate ?
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    (Original post by PlayerBB)
    Ah thanks but isn't it HCl gas that is produced and it should evaporate ?
    Why would it evaporate in water Name:  ImageUploadedByStudent Room1465327004.177033.jpg
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    (Original post by Supermanxxxxxx)
    Why would it evaporate in water Name:  ImageUploadedByStudent Room1465327004.177033.jpg
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    I don't know, I guessed because they always mention the formation of misty fumes from this reaction, anyways thank you!!
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    Can somebody tell me why alcohols release less energy than the equivalent alkane? Whats the reason behind it?
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    Does anyone have a question on kinetics with three columns instead of two so I can work out the order of reactions?
    I know how to do it with two columns but I want to practice with 3.


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    (Original post by ayvaak)
    Hey guys! Could anyone help me understand why the answer is A. Thanks in advance
    The ratio of hydrocarbon and water is 10:20 or 1:2. Because the volume of gas contracted is due to formation of water. There are 4 moles of hydrogen atoms in 2 moles of water. For all given options carbon has 4 moles. Hence answer is A.
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    Quick question y'all, about halogen displacement visualisations. When in a displacement reaction, and I2 is produced. What is the color change? I'm getting conflicting results, is it brown or deep purple? Isn't the color of iodine dark grey, so shouldnt it be grey?
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    (Original post by AlphaWolfZ)
    Quick question y'all, about halogen displacement visualisations. When in a displacement reaction, and I2 is produced. What is the color change? I'm getting conflicting results, is it brown or deep purple? Isn't the color of iodine dark grey, so shouldnt it be grey?
    I thought iodine produced a black precipitate?
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    (Original post by voltz)
    I thought iodine produced a black precipitate?
    See this is where I'm getting confused. Here are 2 different videos with different colors?

    1)

    2) 7 minute mark: https://youtu.be/XqAZgH6APcM?list=PL...JVtnozgAmToHYd
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    (Original post by AlphaWolfZ)
    See this is where I'm getting confused. Here are 2 different videos with different colors?

    1)

    2) 7 minute mark: https://youtu.be/XqAZgH6APcM?list=PL...JVtnozgAmToHYd
    I would use the second video (by Mr Rinthoul) as that was uploaded recently and I use his videos myself. The other video is from 2014 so its probably the old spec
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    (Original post by voltz)
    I would use the second video (by Mr Rinthoul) as that was uploaded recently and I use his videos myself. The other video is from 2014 so its probably the old spec
    I guess I'll just follow Mr Rintoul then. Thanks for the confirmation.
 
 
 
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