Questions tagged [ions]

For questions about ions - atomic or molecular particles having a net electric charge. Do NOT use this tag just because your question involves ions but is not about the ions themselves (as in electrochemistry, etc.).

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16 views

Homework question: how are ceramic ionity crystals kept together? [closed]

The question is: How are ceramic ionity crystals kept together? The three different answers to choose from: Atom pairs of different substance share one electron pair. Ionity pairs of the same ...
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Behaviour of cu+1 ion

Cu+1 ion is usually colourless due to its fully filled D-orbital. However in Fehlings test a positive test is identified by formation of red precipitate of Copper (I) oxide.Why does Cu+1 gives a ...
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62 views

Can H+ ion exist independently?

Can H+ ion exist independently since it does need to form any bonds.Why do we say that it needs to be in H30+ ion form?
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Do some particles get ionised to 2+ or higher in a mass spectrometer or do they only get ionised to 1+?

In a mass spectrometer the sample is vapourised, then ionised, then accelerated. My textbook says that the high energy electrons from the electron gun knock electrons off the sample molecules and ...
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2answers
194 views

How to make acetic acid more volatile so that it can be removed by vigorous aeration of an acetic acid-water mixture? [closed]

I want to remove acetic acid from a mixture of acetic acid and water by aeration. The concentration of acetic acid is 200 ppm (mg/L). The pH of the water is more than 5. I want to reduce the acetic ...
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6k views

Why Ca 2+ and not Ca +2

I have been learning chemistry for a year or two but I still can't understand this. According to maths we should place the plus or minus sign in front of a number like -2. However, In chemistry we ...
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2answers
7k views

Ionization energy comparison between K+ and Cl-

So I have encountered a question which looks very suspicious to me. If you have $\ce{Cl-}$ and $\ce{K+}$, Can you say that $\ce{K+}$ has more ionization energy than $\ce{Cl-}$? We know for a fact ...
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1answer
905 views

Why can't electrons be transferred using hydrogen ions?

Recognizing how oxidation and reduction occurs is essential for analyzing and understanding biochemical reactions. Which of the following methods would NOT be employed in transferring electrons in ...
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1answer
300 views

Does the rate of movement of ions in a salt bridge affect the total voltage produced by a Galvanic cell?

I was thinking that different salts used in a salt bridge in a voltaic cell may have different rates of flow of ions in them (perhaps ionic radius or some other property affects the rate?) I was ...
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1answer
1k views

Electrode Potential at Equilibrium

At each electrode-electrolyte interface there is a tendency of metal ions from the solution to deposit on the metal electrode trying to make it positively charged. At the same time, metal atoms of the ...
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1answer
29 views

Why does lattice enthalpy decrease with increasing ionic size?

Lattice enthalpy decreases as ions get larger, but I have found two explanations: The charge density is greater in smaller ions, so greater attraction The ions are themselves able to get closer ...
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1answer
265 views

Reasons behind the different colors of a solution containing Iodine

Q) Iodine dissolves in a variety of solvents, forming solutions that are purple, brown or any intermediate shade. This property is due to: Hydrolysis of iodine Formation of crystalline adducts Charge ...
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Behavior of ionic salts in solution

The electrons of an isolated sodium chloride bound pair in vacuum reside at a semi-classical level in their ground state, so that the Born-Oppenheimer approximation applies, and the 'molecule' acts ...
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1answer
970 views

Compare stability of transition metal cations in aqueous solution

I have to compare the stability of the following transition metal cations: $\ce{Co^3+, Fe^3+, Cr^3+, Sc^3+}$ in aqueous solution. (Source: Joint Entrance Exam (JEE) 2013 Mains India) The first thing ...
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43 views

In metallic bonding, what causes a metal to lose its outer electrons and become an ion? [duplicate]

In metallic bonding, what causes a metal to lose its outer electrons and become an ion? I am trying to understand metallic bonding, atoms and ions.
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1answer
48 views

Do solid insoluble ions react with soluble ions in aqueous solution? [closed]

Do solid and insoluble ions (like aluminium phosphate) react with soluble ions in aqueous solution (like potassium sulfate)? When would a solid ion react with an ion in aqueous solution in general?
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How does the solubility of hydrated ions differ from unhydrated ions?

So the hydrated compound I am thinking about specifically is pentahydrate copper sulphate. I know when you put ionic compounds in water, the ions because hydrated by the water molecules. However, what ...
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Ion Representations

Some books put dots around ions, enclose them in braces and then put an integer over them to signify the negative charge, in such representations, the integer is only a way to represent the charge and ...
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1answer
17k views

Can metals have a net negative charge

Normal metals like sodium or Calcium have a positive charge as $\ce{Na}^+$ or $\ce{Ca}^{2+}$. Transition metals have a loot of variable oxidation states. Yesterday I read about Iridium in Wikipedia ...
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945 views

Superscript and subscript together after the same atom

In the chemical formula of some ion compounds, there is the necessity to write the charge in the superscript and the numbers of atoms in the subscript, but together at the right of the same symbol ...
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76 views

Equilibrium Constants for Diatomic Gases at High Temperatures

I'm new here and I haven't taken chemistry beyond high school, so please forgive the ignorance. I am reading a book about hypersonic aerodynamics, and I am trying to connect some chemistry knowledge ...
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2answers
439 views

What happens to boiled (BMIM)PF6?

[BMIM]PF6, or 1-butyl-3-methylimidazolium hexafluorophosphate, is commonly used as an ionic liquid. As has been shown by the accepted answer to this question, sodium chloride that has been made to ...
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266 views

possibility of metallic ammonium

In chemistry class, we discussed how metallic bonding occurs when metals lose electrons and become cations while the lose electrons become delocalized electrons and bind the metal cations. These ...
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1answer
499 views

Trichloride ion (c.f. triiodide ion)

While triiodide ion is commonly known, why is that trichloride ion (and its salts) almost unheard of? While it does exist according to literature, why is the stability of trichloride ion in aqueous ...
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1answer
35 views

Why are bonded ions more stable than separate ions? [closed]

I was reading on the Born-Haber cycle when I encountered a problem. The textbook seemed to suggest that since energy must be supplied to separate an ionic compound into it's composite ions, then the ...
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1answer
10k views

Can an Ion Isotope exist?

My question is simple, Can an isotope have a charge? i.e the number of protons and electrons defer in that atom. If it does exists, Is it right to call it an Ion Isotope? (or Isotope Ion) Thanks in ...
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90 views

How do ions conduct electricity? [closed]

I mean to ask what do ions actually do while conducting electricity? Do they simply take up the electrons and transport it? If it is so, I do not understand how anions can take up more electrons if ...
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How does aluminium react with bases to form aluminates?

An example of reaction: $$\ce{2Al + 2KOH + 6H2O->2 K[Al(OH)4] + 3H2 ^}$$ Aluminium is not ionic, how then does it attract the $\ce{OH-}$ groups to bond with them into the complex ion $\ce{[Al(OH)...
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893 views

Do non-classical carbanions exist?

There are some non-classical carbocations, such as the 2-norbornyl cation, in which the positive charge is heavily delocalised. Have non-classical carbanions also been discovered? I have not seen any ...
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41 views

Writing Ionic Equation

According to the rules of writing ionic equation, only compounds in aqueous state can be split or dissociated into their ions, whereas elements or compounds in solid, liquid or gas state remain as ...
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12k views

Chemical Formula for Barium Chloride

Barium Chloride is represented as $\ce{BaCl2}$. Since chlorine is a diatomic molecule, It should be denoted as $\ce{Cl2}$. Formulating, we get \begin{array}{|c:cc|}\hline \small \rm Element & ...
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233 views

Conductivity measurements of demineralized water - Unexpected results. Looking for explanation

I'm trying to measure the conductivity change of demineralized water over a few days. But I get results I can't explain. Setup This is the circuit and cell I'm using: Where $R_x$ is the ...
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97 views

Are all ions stable? [closed]

My science teacher says that all ions are stable, which seems wrong to me. For example $\ce{He^{-1}}$ is an unstable ion of helium, and although it might not exist in the real world, it is still ...
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1answer
59 views

A gram of salt added to pure (distilled) water introduces around $2 \times 10^{22}$ ions? [closed]

I am currently studying Practical Electronics For Inventors, Fourth Edition, by Scherz and Monk. Chapter 2.5.2 Resistivity and Conductivity, claims the following: Adding an ionic compound in the ...
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1answer
475 views

Why is potassium cation harder than copper?

According to HSAB theory, the smaller radius and the less polarizable an acid is, the harder it is. According to Wikipedia, the ionic radii of $\ce{ K+}$ is much larger than $\ce{Cu+}$, which makes ...
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2answers
591 views

What is the pH of HCl solution at $10^{-8}$M? [duplicate]

After using the negative logarithmic value of $\ce{H^+}$ ion concentration, I get a value of pH that results in base. Can you please help me? Thank you in advance
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157 views

Why is the strontium ion smaller than the potassium ion? [closed]

The ionic radius of the $\ce{Sr^2+}$ ion is $\mathrm{132\,pm}$, while the ionic radius of the $\ce{K^+}$ ion is $\mathrm{152\,pm}$. Why is this the case? I would have thought that since $\ce{K^+}$ has ...
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4answers
4k views

Will gaseous ionic compounds be free moving ions?

I knew while learning about electrolysis that if the ionic compound is molten it becomes free moving ions. If that is the case, what will happen if I continued heating till it reaches the boiling ...
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2answers
169 views

For a copper/copper sulfate half reaction, do sulfate anions move to the anode and lose electrons?

In my (high school) textbook, there's an example on finding the charge on 1 mole of electrons, which involves performing the electrolysis of an aqueous copper (II) sulfate using a copper anode and a ...
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2answers
1k views

Why does beryllium lose two electrons when it’s orbitals are already full?

I have a rudimentary understanding of orbitals, as in what they are, the shapes (l, I think) and of the principles. So I was doing the electronic configuration for beryllium, it has 4 electrons. So ...
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3answers
90 views

How to decrease the percent of ammonia that is converted to the ammonium ion in water? [closed]

Ammonia is a weak base that reacts with water according to this equation: NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH −(aq) Will Fe(NO3)3 decrease the ...
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47 views

Total Dissolved Solids and Alkalinity [closed]

I need to calculate total dissolved solids (TDS) of various groundwater samples from chemical analyzes. I have concentrations of ions/molecules in mg/L. I’ve found various formulas to calculate TDS ...
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19k views

Why does salt dissolved in water taste like salt? If it's just Na+ and Cl- ions

When $\ce{NaCl}$ is dissolved into water it breaks down into $\ce{Na+}$ and $\ce{Cl-}$. It stays in this form until the water evaporates and then the ions go back to normal $\ce{NaCl}$. So why does ...
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1answer
748 views

Why is the chlorine ion more stable than the chlorine atom? [closed]

In heterolytic cleavage, for instance, $\ce{NaCl}$ breaks in two fragments $\ce{Na+}$ and $\ce{Cl-}$. If chlorine is fully filled because it takes one electron from sodium, then why does chlorine make ...
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1answer
16 views

Heterogeneous ion solution

I am a college student and for my chemistry of solutions class, I had a lab where we had to titrate orange juice to check the calcium content. However, the experimental results are 20% off the ...
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26 views

A question about potential difference across a membrane

Membrane potential of living cells arising from the difference of concentration of ions on both sides of the membrane, but why didn't someone use selective polymers as AEM (Anion Exchange Membrane) ...
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Why is the ionic product of water $K_w$ the same in acid, water, and alkali?

Seen on the web: The concentration of [H+] and [OH−] both vary based on the the composition (acid/alkaline) of the solution, but the remarkable thing is that their product does not. When [H+] goes ...
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4answers
2k views

Is perchloride the same as perchlorate ion?

I read about perchloride in a talk and after trying to search for its chemical formula, the search results imply that perchloride is actually named perchlorate. Is this correct?
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2k views

Can glass be deionized?

Is there a chemical treatment that could remove sodium and calcium ions from the surface of soda-lime glass to turn it into quartz glass, increasing the hardness?
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1answer
272 views

What is the molecular formula of the nitrate of a metal Q that forms a carbonate of the form QCO3?

A metal $\ce{Q}$ forms a carbonate and a nitrate. The molecular formula of the carbonate of $\ce{Q}$ is $\ce{QCO3}$. What is the molecular formula of the nitrate of $\ce{Q}$? The answer says it is $\...

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