Ions Definition and 332 Threads

The addition of sodium or potassium iodide catalyzes many SN2 reactions of alkyl chlorides or bromides. Explain. I think the reason why it catalyzes many SN2 reactions, has to do with the fact that it is the best leaving group of all the alkyl halides. But why else? Also, is the potassium...

I'm dying here! I've looked on pubmed, crc handbooks, bcem texts and google. I need to know how much of various ions Na, Cl, Ca, Mg etc. get bound to albumin in a Krebs solution at 37 celcius, pH 7.4, and 3mg/dL albumin. I managed to track down a number and do my own test for Ca but the...

Can ions have dipoles? ive had a really long argument with a teacher who says ions can't have dipoles because ions are not compounds... can anyone clarify this for me please

what is your knowledge about carbon ions? is there a machine that determines its creature?

How do you adapt the Donnan Equation to 3 difffusible ions?

We just did a lab in chemistry. My question is in regards to what chemically happened in the lab. this is what happened macroscopically: procedures: 1.) Copper Chloride Dihydrate is put into water. 2.) One aluminum ball (regular Al that u can get in stores) is put inside this mixuture (1)...

What are the monoatomic ions or elements( I am not sure anymore) that make up carbonate? Once this is answered I can ask my real question. -Scott

With the Polyatomic ions, how do you tell an "ate" from an "ite" when choosing the suffix? I didn't quite catch what the teacher was saying but there was something about the charge compared with the subscript, I think? :confused:

okay here's the equation: In a certain molecular structure, the total energy E between two ions is given by E= (-5.6/r) + 10e^(-r/3) where r is the distance seperating the nuclei. now i already sketched the graph but i don't know how to find the domain of E, or...

How many moles of ions are present in aqueous solutions prepared by dissolving 10.00 g of the following compounds in water to make 4.35 L of solution? (a) cobalt(III) chloride (b) aluminum carbonate (c) potassium permanganate (d) strontium hydroxide I first converted the 10.00 g into...

I am to arrange the following atoms or ions in order of increasing radius...then give an explanation for the position of S2- in relation to the atoms or ions that come before or after it. Here is what i have so far...in order of increasing radius. K+ K O S2- Cl Now I am not sure...

Hello everyone. I came here because I'm having trouble with a chemistry question an you guys seem to know what you're talking about =) I need to sepearate Ag^+, Ca^2+, and Ni^2+ ions from a solution. each of these is at a 0.1M concentration. I've never done this type of question...

If you dissolve HCl in solution, the why do the H+ and the Cl- not react with one another? The H+ will react with any metal, will react with OH-, will react with your skin for sure, along with many other things, but why does it seem to just ignore a perfectly good negative ion that is in the...

how does ions affect rusting

How do I know which ions in a reaction are spectator ions? If the reaction forms a precipitate, then I know that the ions that don't form the precipitate are the spectator ions. What do I do in something like the following: HCl + NaOH TiA

how do you work out the amount of mole Chlorine ions in 13.4g of nickel chloride(NiCl2). i don't know how to use the n=m/M with ions?

Recently I had a discussion with friends about impact of H.U.P. on some biological functions. We had disagreement, about uncertainty of position of ion, say in neuron connected to another one by synapse, as a consequence of HUP, point was that if there is some uncertainty in position of ion or...

Hey guys I've a quick question. As an action potential propogates down an axon, as it reaches the end of an axon it causes calcium influx into the terminal end of the axon. This calcium helps the vesicles move towards the pre-synaptic membrane so that they can release neurotransmitters. My...

Hello all Is there any good way to memorize the charges of elements in the periodic table? Thanks?

The ratio of electric fields, E1/E2, at the surfaces of ions when H+ is the first ion (q=+1 and R=0.00001 Angstrom) and K+ is the second ion (Q=+1 and R=1.33 Angstrom) is: how would u solve this kind of problem? well i know that the ratio of E1/E2 is qR^2/Qr^2 so do i just plug in those...

what is the reason why the number of H- ions in a gas must always be less than the number of HII ions?

Just a short question: Now the molecular equation between LiOH (aq) with HBr (aq) is (I presume): LiOH (aq) + HBr (aq) ----> LiBr (aq) + H(2)O (l) Now I'm confused about the net ionic, since there are no ions. Would it just be: OH(-) + H(+) ---> H(2)O?

Just a quick question i wonder some one could help me with, when ions charge do they attract the charge in some way or does the charge have to be some how taken to them throught a thrid party reaction or process, and does enviorment have any affect in the charging process thankyou

Hello, I am wondering if it is possible to absorb free electrons/ions in the air using a statically charged material, or even a magnetically charged material. I've heard that putting a large antenna up high will create a charge potential but what about ripping energy out of ambient air...

Okay, I'm hoping someone here can explain this homework qustion I've got bcause we don't seem to have anything in our notes that covers it, so any help would be great- thanks! Potassium fluoride (K+F-) is an ionic crytal having density 2.48x10^3 kg/m^3 Assuming that the diameters of the K+...

The pH of a solution is determined by the value of -log[H] where [H] is the molar concentration of hydrogen ions in the solution The pH of water is 7, the pH of an acid is 3 and the pH of a strong base solution is 11. Explain the difference of hyodrogen ions in each of these solutions i...

Hello, I'm new here. I haven't done anything more than first year university chemistry, and am not too familiar with the Lewis model for acids and bases. Therefore, please don't be too harsh on me for the elementary nature of this question: In grade school, we were taught that when a...

Hi everybody, I am new to PF and thus far have found it very interesting and helpfull. I have a chemistry question, my test is tomorrow. I know how to draw lewis strutures in general. But i have a question concering polyatomic ions, from what i have learned you should treat each ion...

if i use corona based discharge emmiters in order to ionize air, can i accelerate that air in electric field, having the ion life factor unpredictable? i know the ionization potential of each molecule, as well as new energy, speed, and all variables, can i figure out stability time of ions?

Greetings ! I have a little question. My teacher was talking about stable ions some days ago, he wanted to explain why do we have certain stable ions in ionic compounds and we don't have other ions. For example, we notice that the stable ion of Na (in its compunds) is Na+1 and not Na+2 or...

Greetings ! I searched the web and couldn't find it. I wan'na know the Debye length for Xenon ions. Thanks ! :smile: Live long and prosper.

my mother recently bought a negative ion producing machine, claiming that negative ions have the ability to make her feel happier. is there any way i can scientifically debunk this claim? links would be good.