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How To Name Acids - The Fast & Easy Way!



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in this video we're going to focus on

our name in acids so let's say if you

want to name h2 so4 how would you do it

well first you need to know some rules

if it contains a polyatomic ion with the

word 8 all you need to add is it if it

has a polyatomic ion with the word I

replace it with the suffix is and add

the word acid at the end by the way now

if it's a monatomic ion with the end and

i'd need to add the prefix hydro plus

the suffix i see so let's look at h2 so4

so h2 so4 contains the polyatomic ion

sulfate and to name acids you do need to

know your polyatomic ions so we need to

replace eight with egg so we're going to

add the word sulfur and then egg to it

so it's going to be called sulfuric acid

now what if we want to name h2s oh three

h2o so three contains the polyatomic ion

sulfite and sulfide has the end and i

which you need to replace it with is so

let's start with the element sulfur and

add the suffix is so it's going to be so

furious acid now what about this one

h2s so h2 s contains the mono atomic ion

sulfide which is s2 minus now because it

has the end in IDE we need to add the

prefix hydro then we're going to add the

word sulfur that's the element and then

the suffix I see so it's hydral sulfuric

acid

let's try some more examples so what

about hclo4 what's the name of this acid

so what is the name of the polyatomic

ion CLO for this is called perchlorate

now since it ends with the suffix 8 we

need to replace it with it so we're

going to write the same name but instead

of saying perchlorate it's going to be

perchloric acid

now what about HCl

go ahead and name this acid so the oxy

acid HCl own has the polyatomic ion

hypochlorite so it's the name the acid

all we need to do is replace the suffix

I with is so it's going to be called -

Flores

acid

try this one name the binary acid HCl so

HCl contains the mono atomic ion known

as chloride so to name the acid we need

to add the prefix hydro and then let's

write this part of the main

instead of saying chloramine we're going

to say we're going to replace the ID

with the ick

so hydrochloric acid

now let's try some other examples how

would you know hno3 and hno2 so hno3

contains the polyatomic ion nitrate so

we need to replace the suffix 8 with ick

so we're still going to write the nit

art part and then let's add egg to it so

it's going to be nitric acid HNO 2 has

the polyatomic ion nitrite so let's

rewrite this part and then let's replace

I with is so it's nitrous acid now how

would you name the acid H I H I contains

the mono atomic ion iodide so we need to

add the prefix hydro the word IO or IO D

and then replace the IDE part with it so

it's hydral yodok acid try this one

H C 2 H 3 o 2 what is the name of that

particular acid

so let's find the polyatomic ion first C

2 H 3 o 2 - this is called acetate so

we're going to keep the part without the

8 and we're going to replace the 8 with

it so it's going to be acidic acid

how would you learn or rather how would

you write the formula for phosphoric

acid so let's work backwards so what's

the first thing we should do in this

particular example the first thing that

you need to look for is the polyatomic

ion that is associated with phosphoric

acid we don't have the word hydro so

we'll know it's not a monoatomic ion so

it has to be a polyatomic ion and

because we could see the IgG part of the

acid we know is associated with eight so

it's going to be phosphate the formula

for phosphate is po4 3 - now take a look

at the negative charge because the

charge is negative 3 we need to add

three hydrogens to it to neutralize that

negative 3 charge each hydrogen ion has

a +1 charge so it's going to be h3po4

simply add 3 hydrogen's to it put it in

the front and that's how you can name or

rather write the formula for phosphoric

acid let's try another example try this

one

phosphoric acid so what is the formula

for phosphorous acid what polyatomic ion

corresponds to it so we can see the

suffix is so we'll know it's associated

with phosphite and the formula for

phosphide is PL 3 negative 3 so we have

to add 3 hydrogen's to it so the formula

is going to be a ch3 p o3 what is the

formula for carbonic

feel free to take a minute and try that

example so once again we don't have the

prefix hydro so we know it's a

polyatomic ion and because we see the

suffix ik its associated with 8 so what

is the formula for carbonate the formula

for carbonate is Co 3 2 minus so we have

a negative 2 charge we need to add two

hydrogen's to it so it's going to be h2

co3 this is the formula for carbonic

acid now what about this example hydral

Gromack acid what is the formula so

notice that we have the prefix hydro

that's a good indication that it's a

mono atomic ion most likely there are

some exceptions so the mono atomic ion

4br is simply bromide so whenever you

see IDE is associated with the prefix

hydro and I see that part is pretty much

a guarantee that that's usually the case

the formula for bromide is BR with a

negative one charge now since we have a

negative 1 charge we need to add only

one hydrogen to neutralize it so

therefore the formula for the acid is

simply hbr now consider this example

it's a little unusual but we can still

get the answer hydro sine ik acid so we

have the prefix hydro and the suffix IC

so it indicates that it's probably a

monatomic ion however we also know that

it has to have the end in ID so this has

to be associated with cyanide now

cyanide is not a monatomic ion it's

actually polyatomic it has two atoms

but nevertheless it does have the suffix

IDE which is associated with Hydra plus

IC so that rule is pretty much intact

since it has a negative one charge we're

going to add only one hydrogen to it so

it's going to be HC n that's the formula

for hydrocyanic acid