Ionic Definition and 280 Threads

Suppose I have a perfect crystal(e.g.TiO2-Rutile, band gap=3ev), under UV light, there should photoconductivity, according to the condensed matter theory, some of these excited conduction band electrons would form small polarons, I am wondering how many percent of the free conduction band...

When breaking an ionic bond in order to form a new compound, do the atoms retain their charge (new electron configuration) or revert back to their original form before creating a new bond with a new partner? Are all ions in a bond of some type or can they exist freely on their own?

Is a "double" ionic bond (the transfer of two electrons) like in MgO any stronger (or really any different, structurally etc.) than a "single" ionic bond (the transfer of one electron) like in NaCl?

When you dissolve, for example, NaCl in water, then you get "NaCl in water" solution. Will the "NaCl in water " solution have different chemical properties from its constituents(NaCl and H2O)? i.e. is a "NaCl in water" solution a new compound with respect to NaCl or H2O ? And is the ion...

i am having a problem in understanding the question , what will be the volume of hcl ? and how is the reaction going to take place ? please help me i am stuck on this problem for quite a long time.

Right now we are learning about the Lewis definition of acids and bases. I don't get the clear difference between co-ordinate covalent and ionic bonds. For example, AlCl3 is listed as a co-ordinate covalent bond because experiments show that it behaves like a covalent molecule. Why can't it be...

Name: Iron (III) oxide C: Fe+3 A: O-2 My work** Should this be separated just like this for the first step?

Here is my work** Magnesium cations (Mg2+) Oxide anions (O 2-) A magnesium ion has a 2+ charge and the oxygen atom has a 2- charge. The formula for the ionic compound is MgO.

I got the first question correct but I don’t understand the answer given for second question which is c (Pb^2+) = 8.4x10^-5 molL ^-1. It divided the concentrate for sulphate ion of Ag2SO4 into 2 , but it is the solubility right ?

I got a answer by equation the moles i took the n factor of oxalic acid as 2 and the naoh solution came out to be 2M but i got an answer of 4grams but the answer given is 2 grams am i correct ??

Answer given is 6.61g.

I have the following molecule: benzotriazole. It has pka=12. At pH=6 which form prevails? a) neutral b) anionic c) cationic d) none of the above. I thought the correct answer was c) cationic: pH<pka, benzotriazole has basic functional groups (amines).

Hi, so I've been learning about the energy transfers for an ionic bond, but my understanding breaks down at what seems to be the last hurdle. I will write what I know so far. So we need some energy that is listed as the ionisation energy to remove electrons from one atom then we need to put the...

Homework Statement Do ionic compounds such as NaCl and K2O have intermolecular forces? 2. The attempt at a solution I got stuck conceptually. NaCl and K2O are ionic compounds. Their basic unit is formula units. They are not molecular compounds. Ionic compounds are held together by...

Homework Statement There are four things to be calculated: -pH of 0.00196M solution of HCl in water, without taking ionic strength into account, -The same thing but taking ionic strength into account -pH of 0.00196M solution of HCl in Na2SO4, without taking ionic strength into account, -And...

Homework Statement Name the ionic compounds: a) ##K_2SO_4## b) ##Ba(OH)_2## c) ##FeCl_3## Homework EquationsThe Attempt at a Solution These problems are actually in a sample exercise so I already have the answers, I just am really lost in this section of chemical nomenclature. First, at...

Homework Statement The ionization constant of ## {(C_2 H_5)}_3 {N}## is 6.4 x 10^(-5). Calculate degree of dissociation in its 0.1 M solution when it is mixed with 0.01 M NaOH solution. 2. The attempt at a solution the compound gives ##{(C_2 H_5)}_3 {NH+}## and ##OH-##. C is initial...

I am sure this question will have been asked elsewhere, so please forgive me if it has. My question involves the transfer of electrons in ionic bonding. We are told that a metal will give up its outer most electron because by doing so it will gain the electron configuration of a noble gas...

Homework Statement Homework Equations n/a The Attempt at a Solution I'm kinda confused on the instructions of this net ionic lab. For this lab, I am suppose to find out how several solutions (6 of them) react with each other to form precipitates. We use some systematic way to test these by...

Integral constant for internal energy of ionic liquid I have a question, and I will be really grateful if someone helps me. I have a polynomial equation for internal energy which I calculated by integration an equation of state formula, which is based on density. But, because I calculated this...

Integral constant for internal energy of ionic liquid I have a question, and I will be really grateful if someone helps me. I have a polynomial equation for internal energy which I calculated by integration an equation of state formula, which is based on density. But, because I calculated this...

Hi. I have a question about the term, "Ionic liquid" When I researched the papers, I found the word "Ionic liquid" in many papers. First, I thought the ionic liquid just means the solution that solvent is ionized. But as I read other papers, I found that people don't mean ionized solution as...

Hi all, I have a question about the quantum nature of ionic bonds. I know some ideas about molecular bonding which can combine two ground state of H atom to get a bonding state and an anti-bonding state which in the case of H2 molecules it correspond to the covalent bonding (sharing of...

Our text says that ionic bonds are much weaker in aqueous solutions than covalent bonds, due to the dissociative properties of most ionic compounds in water. I read elsewhere though, that in general, ionic bonds are stronger due to the increased polarity. So, in protein folding, when different...

I need the ionic radius of the cation in the following anhydrous salts: FeCl2 and CoCl2 Looking at this database: http://www.knowledgedoor.com/2/elements_handbook/shannon-prewitt_effective_ionic_radius_part_2.html Knowing that the coordination number of both Fe2+ and Co2+ cations is 6, I am...

Table 1. Preparation of Constant Ionic Strength McIlvaine Buffered Solutions Reference: P.J. Elving, J.M. Markowitz, I. Rosenthal, Analyt. Chem. 28(7): 1179-1180 (1956) pH Desired Composition, G/Liter of Solution Composition, Moles/Liter of Solution Buffer System G/Liter of KCl added per liter...

Homework Statement Under which set of conditions is the ionic product of water, Kw, constant at a given temperature in aqueous systems? in dilute acidic but not dilute alkaline solutions.in dilute alkaline but not dilute acidic solutions.in both dilute acidic and alkaline solutions.only at...

In a crystal, the index of refraction is always calculated in the Lorentz oscillator model by examining the electronic response to an incident field and assuming a stationary nucleus. Is there however, any contribution to the index from the ionic nuclei in the background? I assume since I've...

Homework Statement please see the attached image 1998 ,b part question [/B]Homework Equations none The Attempt at a Solution i thought that Agcl would give Ag+ and cl- ions whose concentration can be found from Ksp as √Ksp,this Ag+ reacts with NH3 to give Ag(NH3)2+ (reverse of the given...

When ionic compounds melt, do their state change or they are chemically changed? Or both? Since the electrostatic forces are overcame?

I've been looking all over the internet, can calcium and iron form an ionic bond, Gold and Radium, Sodium and Tin. If those elements happened to run into each other. Also, another thing I don't understand is why don't the atoms in my hand bond with atoms on the wall when they come into contact.

I was asked to take NaCl then add HNO3, then add AgNO3, and to write a net ionic equation... then add NH3 to the same mixture and write another net ionic equation. I have been trying between work and everything else to try to do this one. it wasn't well understood in class and now I haven't...

Homework Statement It's been a minute since I've used this stuff. Name the Ionic Compound Ca(MnO4)2 Ba(HCO3)2 UO3 NaH2PO4 Homework Equations In my book it says you name the cation first then add an Ide to the root. In UO3 this seems to work as its Uranium Oxide. But for the others I am not...

Another question and a another terrible illustration. So my question: do faraday cages interfere with dispersion of ionic solutions? In the illustration, a chemical reaction or some other cause for a lower concentration of ions is happening inside a faraday cage at B. Will the solution disperse...

Hello Physics Forum, I have a quick question for the scientific community that I am unable to find online (likely because the term doesn't exist), but is there are term for the act of an electron moving from one orbit into another when binding two elements? Also I have a very minimal...

I'm studying electrolysis with ionic compound and the example refers to PbBr2 However, I'm confused as to why this would ever be a substance because a Pb atom has 4 electrons in its outer shell while a Br atom has 7 electrons in its outer shell. If the two Br atoms were to gain an electron each...

Can a large body of electrolyte be used for ground? For example, if we placed an insulated metal into the ocean. If it was charged, would the ocean water be treated as the other electrode in calculating it's capacitance?

Hi there, I'm studying for IGCSE Chemistry and I'm a little confused with Bonding/Molecules. My textbook says: "Molecules are held together by covalent bonds" I'm a little confused by this as I thought a molecule was formed when two or more atoms (same or different elements) join together...

I came here from https://www.physicsforums.com/threads/i-dont-understand-how-hcl-is-not-a-ionic-bond.449393/ where replies are no longer allowed. I wanted to reply to suggest a few things: High school students who like chemistry are far smarter than anyone will give them credit for. High...

Homework Statement Write a balanced ionic equation for the half equations given below: Al----> Al^+3 + 3e- 2H^+1 + 2e- -----> H2 Homework EquationsThe Attempt at a Solution I think the answer is: 2Al + 6H^+1 ----> 2Al^+3 + 3H2 But the answer in the book is: 4Al + 6H^+1 ----> 2Al^+3 + 3H2 What...

Homework Statement balance: SO2 + Br2 + H2O -----> SO4 ^-2 + Br^-1 + H^+1 Homework EquationsThe Attempt at a Solution I think the answer is: SO2 + Br2 + 2H2O ----> SO4^-2 + 2Br^-1 + 2H^+1 But the answer in the book is: SO2 + Br2 ----> SO4^-2 + 2Br^-1 Is my answer the correct one?

Homework Statement An ionic equation is an equation that shows the chemical species that actually take part in a reaction. Ex. Pb(NO3)2 (aq) + 2KI (aq) -> PbI2 (s) + 2KNO3 (aq) So the ionic equation for this reaction is Pb2+ (aq) + 2I- (aq) -> PbI2 (s) How do we know that Pb2+ and I- takes...

I have a DC source. then I connect a capacitor from the +ve to ground. if all connection are made from ordinary , copper for example, wires then electrons flow from negative to positive terminals.So electrons from the negative side of the capacitor would flow to the positive. I wonder what...

The atoms in an ionic compound are either positively or negatively charged. I read that sodium hydroxide can cause permanent eye damage, because 'the ions travel to the back of the eyes'. Compounds are neutral, so for this to happen the ions must separate from the compound. Is this possible? If...

Crystals of high ionic charge are less soluble. why?As we know,when hydration energy is less than lattice energy the ions are not soluble. So,crystals of high ionic charges have less hydration energy right?And it does make sense to me as higher the charge ,greater the lattice energy because...

In my textbook one of the conditions for formation of ionic bond is given as The cation should be large and anion should be small But in the image of Nacl lattice structure ,we can see that it is other way around I am not getting the reason,Is my textbook wrong ? Or it has something to do with...

I have come up with a paradox: Ionic crystals, in which cations and anions form a lattice, seems to have total electric dipole moment! For example, consider a one dimensional example: ##+ - + - + - ... + - + -## In the above picture, a ##+## represents a cation and a ##-## represents an anion...

Homework Statement The net ionic equation for the reaction between aqueous solutions of HF and KOH is___. Homework EquationsThe Attempt at a Solution At first I thought it would simply be H+ + OH- = H2O, with the K and F ions as spectator ions. But the answer is apparently HF + OH- = H2O +...

Homework Statement I need to draw NH4NO2 which is an ionic compound. 3. The Attempt at a Solution NH4 is fairly straightforward to draw, with one N in the middle and four H surrounding, and no lone pairs. The problem comes with NO2- which is one nitrogen bonded to two oxygens. However, one...