Questions tagged [halogens]
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Why does chlorine have a higher electron affinity value than fluorine? [duplicate]
Why does chlorine have a higher electron affinity value than fluorine? Since this periodic property tends from the bottom up (in the group), the logic would be that the fluorine is the element with ...
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Synthesis Sec - Butyl Bromide from alcohol
The question is to make Sec-butyl Bromide from alcohol. From what i have read, 2° and 3° alkyl bromide and alkyl iodide cannot be formed with Conc H2SO4 as it will make it into alkene.
I have tried
P4 ...
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Naming and structure of PtCl4.2HCl (complex/coordination compound)
Given that $\ce{PtCl4.2HCl}$ when reacted with excess of $\ce{AgNO3}$ produced zero moles of $\ce{AgCl}$, I understand that all the chlorine atoms are inside the coordination sphere. But what will the ...
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Iodine solution concentration
I am planning to make 1L of 0.005M iodine solution from KI and I2. I have found instructions that say to use 2 g of KI and 1.3 g of I2 but no explanation why exactly this particular amount. I also ...
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Formation of hypofluorite from F2 and hydroxide
Why $\ce{FO-}$ can't form in reaction of $\ce{F2}$ with $\ce{OH-}$ but $\ce{ClO-}$ can form on reacting $\ce{Cl2}$ with $\ce{OH-}$?
Is $\ce{FO-}$ very unstable?
I know that fluorine can't have ...
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Substitution or elimination when a chloroalkene reacts with NaOH in ethanol?
NaOH + EtOH will eliminate the Cl atom forming a double bond. At least, that's what I think. 3 could also be a viable answer since the OH can also attack the said double bond (this is probably not ...
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What words can I use to differentiate between cases where two atoms are of the same element versus when two atoms are of different elements?
I am writing my thesis, and usually I'm quite good with picking the right words for specific phenomena, yet I am having trouble finding the right words for this specific circumstance. I am trying to ...
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Very Little Astatine
Astatine is the penultimate halogen in the periodic table with atomic number 85. It is very much radioactive and would vaporize itself by its own radioactivity before being collected. But there is ...
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Elegant and fast way without chromatography to remove fluoride ions from water phase without contamination of the polar water soluble product?
I have a challenging purification routine. I want to remove fluoride from an aqueous solution, my product is a phosphonic acid, which is readly water soluble and an anion.
The anion is about 200 Da in ...
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How can chlorine be 'only' the third-most electronegative element yet have the highest electron affinity?
From Wikipedia:
It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity on the Pauling scale,...
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How to find the percentage of chloroderivatives after monochlorination of a compound
There are series of examples in my textbook to decipher the chlorination selectivity.
The example was to find percentage of monohlorderviatives of n-pentane after free radical halogenation giving ...
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Markonikov's Rule (Cyclohexene reacting with H-Br)
Based on Markonikov's rule, H-X hydrogen will be added onto the carbon (double bond) with more hydrogens. Therefore, the LHS and the middle makes sense. But why is the RHS product possible ? Hydrogen ...
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What makes a good chlorinating agent?
From what I know, good inorganic chlorinating agents, $\ce{SOCl2, PCl3, PCl5}$ are able to substitute a poorer leaving group (like $\ce{OH-}$) for chlorine. For example, for substitution of the ...
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Why, out of the main halogens, is bromine the most soluble in water?
Why, out of the main halogens, is bromine $(\ce{Br2})$ the most soluble in water?
Why is there such a drastic decrease for iodine $(\ce{I2})?$
Here is a table from my inorganic chemistry textbook with ...
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Which Group 16 elements form stable dihalides?
My textbook says that "except oxygen, all elements of group 16 form dichlorides and dibromides", while other sources quote that only Oxygen and Sulphur form dihalides and dibromides.
Whereas,...
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