This introduces polyatomic ions and where to find them and recognize them on an ion table. It also works through an example of writing the formula for a compound with a polyatomic ion, including where to add brackets
www.BCLearningNetwork.com.
0:00this Dayana compounds with three or more elements contain polyatomic ions
0:07will show you how to write formulas for compounds but polyatomic ions
0:12a polyatomic I N years
0:15a group with Adams that bond together and stays together
0:20black make a single unit the whole I N
0:24has a net charge in the example shown here
0:28there is one nitrogen atom and three oxygen atoms
0:31and the eye and has a charger -1
0:34so the formula is and all three minus
0:38the name at this polyatomic ion is Nate Reid
0:44here's a table that contains the formulas and charges the in's will be
0:48using in this course
0:51the polyatomic ions are the ones with more than one element
0:55in this table they are shaded
0:57the other Ryans on here are not polyatomic
1:00the airlines have single elements
1:03polyatomic ions are easy to recognize because the formula always has more than
1:08one capital letter
1:10for example the hydroxide I N is polyatomic
1:13because it has a capital all and a capital H
1:17you'll always be able to use a table like this when you're writing formulas
1:21our names Brianna compounds
1:24the only positive polyatomic I N will be using
1:27is ammonium with the formula NH for parts
1:32all the negative polyatomic ions are shaded pink
1:35you can see there are quite a few days
1:39if you look at the name to the you can see that many have been
1:42and in eighty make acetate carbonate
1:45in a trade
1:47a few them and and I T E alright make law right
1:51hypochlorite and nitrate
1:55and three polyatomic ions have names ending in I'd
1:59cyanide by sulfide and hydroxide
2:02the other alliances names and indict on this table
2:06are not polyatomic ions the airlines up a single element
2:10like bromide alright acceptor
2:14noticed that for the polyatomic ions have two possible names
2:18separated by a comma
2:20either name can be used for example HC 03 minus
2:25can be called hydrogen carbonate or bicarbonate
2:30rest to rate the formula for barium chlorate
2:34looking at barry among the periodic table we see that it forms a BA two plus
2:38sign
2:40chlorate is a polyatomic I N on the I in table
2:44its formula is C L O three but the negative one charge
2:49with one barium in one query I am the total positive charges positive to
2:54and the total negative charge is -1
2:57the Chargers are not balance they do not add up 2-0
3:01so we had one more chlorate I N
3:04and the total negative charges now -2
3:07and now the charges are balanced
3:10there is one BAE I N and to clear a tie ins
3:15the subscript to you here to the right at the Seattle 3
3:18means there are two chlorate mines in the formula
3:22whenever a subscript refers to a polyatomic ion
3:25brackets must be drawn around the polyatomic ion make yes
3:30and now we have the final
3:33formula for barium chlorate be a
3:36celo three in brackets to the formula tells us that the compound barium
3:42chlorate
3:43has one barium I N and
3:46to worried I'm do
3:51the
Негізгі бет WCLN - Formulas for Compounds with Polyatomic Ions - Example 1 - Chemistry
Пікірлер