All Questions
Tagged with halogens inorganic-chemistry
10 questions
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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 ...
- 19
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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 ...
- 829
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533
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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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3
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3
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Why chlorate(V) is one of the primary products of disproportionation reaction between chlorine gas and hot concentrated NaOH?
Cold diluted $\ce{NaOH}$ reacts with $\ce{Cl2}$ producing hypochlorite:
$$\ce{2 NaOH(aq, dil, cold) + Cl2(g) -> NaClO(aq) + NaCl(aq) + H2O(l)},\tag{R1}$$
whereas hot concentrated $\ce{NaOH}$ yields ...
- 63
21
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Why is the boiling point of fluorine lower than that of oxygen?
Fluorine boils at -188.1 °C and oxygen boils at -183 °C, but shouldn't $\ce{F2}$ boil after $\ce{O2}$?
Despite being electronegative elements, both are nonpolar molecules and posses dispersion forces ...
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-5
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Can halogens show -3 or -5 or -7 oxidation state. Why? [closed]
I mean can we think it like if the electrons get excited into the d orbitals and because there are now more than one unpaired electron, why does it only loose them and why don't they accept more than ...
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7
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2
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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 ...
- 109
7
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3k
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Why do diluted sulfuric acid and hydrogen peroxide etch copper only when chloride ions are present?
I've mixed 30 ml 10% sulfuric acid with 20 ml 3% hydrogen peroxide and put a drop of this solution onto copper foil. The solution quickly removed the oxide layer from the copper but did not dissolve ...
- 191
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Why is chloride measurment 0 [closed]
In class we did an experiment to measure chloride in different water sources, including a lake. We used Ion-selective electrode of Ag/AgCl technique.
We did the calibration curve and all steps and ...
- 23
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Are there terms for ions of chlorine other than chloride?
An ion of chlorine with a charge of −1 is called a chloride ion/anion.
Are there terms for other ions of chlorine, for example, $\ce{Cl+}$ or $\ce{Cl^2-}?$
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