Precipitation Reactions and Net Ionic Equations - Chemistry

[@TheOrganicChemistryTutor]

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[@marlenegarcia6811]

@@TheOrganicChemistryTutor Why is it Pb 2+ and not Pb 4+ if on the chem table it say it has a 4+ or 4-

[@fanaticflame6946]

Its a transition metal, so they generally have different ions (depending on which given one) In the question, he used Pb(NO3)2, tracing back on the criss-cross method, that shows that the lead (Pb)charge used in that reaction would be +2, If it was Pb(NO3)4 then the lead (Pb) charged used would be Pb+4 @@marlenegarcia6811 😀

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2:54 for those of you looking specifically for Precipitation Reactions :D

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[@vqxm7]

i have a question someone please answer why did he leave 2AgCl in the products at 4:52? why didn't you separate it and write the charge like you did with ca(no3)2?

[@neptune6619]

I have the same question

[@AtillaAltunbayrak]

Very helpful video, helped me understand a lot of important details about the precipitation reaction before an important exam. Thank you!

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[@adt4025]

4:13 Why was there a 2 out in front of Cl-?

[@alfredomercado6545]

Hello, how do I know if a precipitation forms or not? how do i know which if the precipitate?

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[@JohnMunnerlyn]

The phrase he uses for ions that are the same on both sides of the equation is "spectator ions". I agree with Addie Jane, I learned more in ten minutes than in an hour lecture.

[@elle_mundo]

thank you so much with explainig this. I had trouble understanding how to make reactions and now I know

[@陈冠廷-j9j]

Hello, how do you determine the state of a new combined ion? I am just confused about whether this new ion is aqueous or solid or liquid or gas? Thank you!

[@mrfresssssh]

look up the solubility rules for liquid/solid

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[@cardcaptorsakurax16]

@5:22 when you write the final met ionic equation, why do you not include the coefficient 2 with the Ag+?

[@kacpimaciej]

He did

[@thegoose3000]

Everything was divisible by 2. You want the lowest known integer

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[@BikesandBoulders]

For 7:38 there are 2 NO3's so wouldn't you write Na2(NO3)2? Since (NO3)2 would have a -2 charge as there are two of them so it would require 2 NA's ?

[@youtube_cws1969]

NO3 still has a -1 charge but there's two of them to match the 2+ charge of lead. When you combine Na and NO3 together they both have a -1 charge so it becomes NaNO3. Na2(NO3)2 is just reduced to NaNO3 since everything is divisible by 2.

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[@kevinmason9592]

Confusion: at 10:16 you say that Pb has to have a +2 charge because there are 2 NO3's which make a -2 charge. So you're manipulating the charge of the PB to match the polyatomic ion. However, if I look at a periodic table, I see Pb being in the column that is + or minus - 4. So my question is, why don't we manipulate the charge of the polyatomic ion to match the charge of the lead, and five the NO3 a -2 charge?

[@mikuculus3720]

Pb has multiple oxidation states because it’s a transitioning metal but No3 is at a constant state of -. So we add more No3 to even it out.

[@Beennnzzzzooooo]

Thanks helped out a lot!

[@SMB_Nut]

How do you know each nitrate has a +1 to get a +2 charge from Pb? 6:30

[@Aetherith07]

3:30 - If it's insoluble, you write it labeled as a solid and not Aq, right?

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[@hetalraiththa1127]

are double displacement and precipitation rection same??

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[@dominoscustomersupport4373]

Yes he said it in the beginning

[@qoaeramv]

Why do you leave the PbBr2 as it is and not seperate them?

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[@EdenHonaker]

hi how do I find charges of the elements?

[@Prinze203]

dunno if you still need the answer but it depends on the group the element is in on the periodic table. For example, the halogens have a charge of -1, and the alkalai metals have a charge of +1. You can easily find a periodic table that displays this information on google.

[@quesiachagas5446]

why you did not put the subscript on cl2? AgCL2

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[@mollylebrun8137]

1:02 why do you only write Cl instead of Cl2? I don't understand that part. Please help I'm struggling on my chem homework lol ughhh

[@kaitlynmcgoey6479]

Hey! I know that this is super late, but if anyone else has this question, it is because Cl is an ION when (/after) going through this reaction. Therefore, it does not need to be marked as a diatomic element - which is why it typically has a 2 beside it as Cl2. That is also the reason that he is emphasizing the importance of finding the correct charges. (Because they are all ions). Hope this helps!

[@አልህምድሊላህበእላህሰም]

@@kaitlynmcgoey6479 no need for all of that its just because the Cl oxidation number is -1 thats why

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this was very helpful! thank you!

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my professor could never

[@KWANELEMPATANE]

Can I ask why didn't you consider that 2 of chlorine when trying to find the products ?

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