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Write the formula of the product of the Lewis acid-base reaction of boron trifluoride and ammonia_The hydrated cation A/3t(aq) is weakly acidic in water. Explain br...

Question

Write the formula of the product of the Lewis acid-base reaction of boron trifluoride and ammonia_The hydrated cation A/3t(aq) is weakly acidic in water. Explain briefly why_ AI(HzO)s3t(aq) + Hzo() AI(HzO)sOH2t(aq) + H3Ot(aq)(a) Show the structure of a silicate anion, containing 6 Si atoms, in which the silicate tetrahedral, SiO4, shares two 0 atoms.(b) Provide the silicate formula including the overall charge of the anion (Hint: double check by looking at oxidation numbers of Si and O).The perc

Write the formula of the product of the Lewis acid-base reaction of boron trifluoride and ammonia_ The hydrated cation A/3t(aq) is weakly acidic in water. Explain briefly why_ AI(HzO)s3t(aq) + Hzo() AI(HzO)sOH2t(aq) + H3Ot(aq) (a) Show the structure of a silicate anion, containing 6 Si atoms, in which the silicate tetrahedral, SiO4, shares two 0 atoms. (b) Provide the silicate formula including the overall charge of the anion (Hint: double check by looking at oxidation numbers of Si and O). The perchlorate ion is an oxoanion containing Cl with oxidation number +7. Write the formula for the perchlorate ion. Explain briefly why HCIOa is a stronger Bronsted acid than HBrO4



Answers

Write a Lewis structure for each of the following polyatomic ions. Show all bonding valence electron pairs as lines and all nonbonding valence electron pairs as dots. For those ions that exhibit resonance, draw the various possible resonance forms. a. nitrate ion b. carbonate ion c. ammonium ion

Okay, cooperate. I am. Let's say that extradition spit off Gloria is X oxygen has extradition state minus true investor. You off them and the overall sum must equal the charge off the iron it's minus. While when was this a creation? With respect to X, Give us five. The extradition spit off glory in is five be hydro I Arctic Basin tradition state off hydrogen is plus one iron Down is X and the orbital charge is zero X equals minus one. So the extradition state of iodine is minus one scene Iodine try chloride. Gordon has high electric negativity than a dime, so it forms chloride and the extradition state off glory in is minus one tradition. State of iodine is X, and that overall charge is zero. X equals free extradition. State off iodine is free and extradition state of chlorine is minus one. The sodium hydrochloride tradition states over. Giorgio is last one. Chlorine is X, and oxygen is minus truth. The orbital charge is zero mm x big growth one. Extradition state off glory in is one Hey, aquatic Jason oxidation state off. Hydrogen is blessed. One Corning is X. Mm archer Dream is minus truth. The overall charge is zero, Which gives us X seven. The exhibition Spit of chlorine is seven f. Xena, get her a fluoride oxidation. State off. Xenon is X extradition. State of Florida is mine for for four Floridians. And the overall charge is ah zero. So oxidation state off. Zimmerman is four and the oxidation state off. Floren is minus one.

President Structures of a fast example we have is I know too much so we can have Jin nitrogen gen all negative charge Luke has. And then we right action. And then, I believe, to further resonant structures be on this exam example H c 03 minor. So we have the following Trump June, then true nitrogen. We are structure where we're just shifting on the last example of each miner. We some Yeah, surgeon highest gym in the film negative charge.

Here we are looking at some lower structures, So firstly, I've seen three to minus. So we've got a negatively charged an iron. So that looks as follows. Carbon with a double 1 to 1 oxygen and two single bonds to further oxygen's. The oxygen's with the single bonds have three lamp as the oxygen with the double bond has want to Lopez next example, we are N H four. Plus, what we have is our central nitrogen, um, for hydrogen in a tetra federal arrangement with a formal positive charge. Here we have Cielo minus that looks as follows c l chlorine three lamb pairs oxygen with three lamb pairs with a formal negative charge.

We are asteroid. A lure structure for the phosphorus try fluoride molecule. I've given you the chemical formula pf three phosphorus is in group five and florian of course is in group seven. Let's put her phosphorus I adam separate in the center and put its 1234 five electrons. Flooring and I'm going to put all my efforts in has seven valence electrons. I'll put in all seven for each one of the three florins. And then I'm going to draw this as the more common form over here with lines replacing each single bond. So this is a We are asked if the octet rule is satisfied for all the answers or for all of the atoms and the answer to that of course is yes. The octet rule is satisfied for everything which you will learn soon. Is not true for every phosphorus. Yeah. And actually for every flooring question B asks us to determine the oxidation numbers for the phosphorus and for the flooring. Well the halogen are going to be negative one since there are three of those were going to have to have a plus three for the phosphorus. So those are the oxidation numbers questions she asks us to determine the formal charges. As a reminder, the formal charge is equal to the number of valence electrons minus the number of lone pairs. For unshared pairs minus one half times the number of bonded electrons. So for phosphorus and for flooring I'll do them both together here, phosphorus has starts with five florin starts with seven. That is the number of valence electrons for each. Looking at her formula right here we can the number of valence electrons minus the number of lone pairs, phosphorus has two lone pairs. Those are right here. Each of the Florence has three lone pairs three times two is six. Now we're going to subtract one half times the number of shared electrons for phosphorus, there are six shared electrons. So this equals zero. The formal charge for phosphorus is zero for flooring, there's one shared period electrons. So it'll be one half times two. Also zero. The formal charges for each of our Adams, phosphorus and flooring are zero. Lastly, were asked if the oxidation number for the p adam is the same as the formal charge. I don't know why they asked that. Considering you just calculated them both, you found out they weren't the formal charges zero and the oxidation number is plus three and I think that's it. Let me double check here and make sure I have everything. Hang on, just a moment, I'm getting back to my problem. It's going to take me a second to get back there. If you're good, go ahead and be done. I just want to make sure I answered all parts of my question. Mhm. Okay. No, I have to do. I have to explain this. So the formal charge which we've already indicated can be charged can be calculated by taking valence electrons minus the number of lone pairs, minus the number of shared electrons divided by two. The oxidation number is the number of electrons and adam gains or loses. It's how many electrons are gained or lost. And the formal charge is not does not consider that it considers the bonded electrons, lone pair electrons and the number of valence electrons to start with.


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