# OPTION: Industrial Chemistry (1 Viewer)

##### Member
jk, it was about 0.41 mol/L.

0.028 = .17^2 * .17 / x
x^2 = .17^2 *.17 / 0.028
x^2 = 0.175
square root 0.175 = 0.41

Can confirm by plugging it back into the equation:
.17^2 * .17 / 0.41^2 = 0.28ish

The 0.41 is not exact as I didn't carry over the significant figures properly during the calculations.

#### Thank_You

##### Active Member
OMG I know what i did wrong i labelled NOCl as 'x' w/o considering the stiochiometric ratio, should of been 2x. GG

##### Member
Never saying anything ever again until i know i'm right. gg, can't even capslock that.

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#### emilios

##### Well-Known Member
I got 0.84M for the NOCl equilibrium q and im like 99% sure thats the correct answer

#### faisalabdul16

##### Wot
jk, it was about 0.41 mol/L.

0.028 = .17^2 * .17 / x
x^2 = .17^2 *.17 / 0.028
x^2 = 0.175
square root 0.175 = 0.41

Can confirm by plugging it back into the equation:
.17^2 * .17 / 0.41^2 = 0.28ish

The 0.41 is not exact as I didn't carry over the significant figures properly during the calculations.
Dude its 0.34^x 0.17/x^2

^ +1

#### dan964

##### what
did any1 get the concentration as 0.8 mol/l or w/e
nope.
it is 0.84

K = [NO]^2 X [CL2]^1 /[NOCL]^2

0.028 = 0.34^2 X 0.17 / [NOCL]^2

[NOCL] = sqrt (0.34 x 0.34 x 0.17/0.028)
= 0.84

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#### Ultrafezz

##### New Member
I thought value of K was Products over Reactants, which would mean it was:
0.028=[NOCl]^2/[0.34]^2*[0.17]
[NOCl]^2=0.028*[0.34]^2*[0.17]
[NOCl]=Sq Rt of above answer
I think I got 0.023

#### Emma Watson

##### Member
i got full marks but i stuffed up the fucking solvay shit didn't touch that shit cause i thought it won't be in exam. RIP

lol wrong

#### Emma Watson

##### Member
nope.
it is 0.84

K = [NO]^2 X [CL2]^1 /[NOCL]^2

0.028 = 0.34^2 X 0.17 / [NOCL]^2

[NOCL] = sqrt (0.34 x 0.34 x 0.17/0.028)
= 0.84
this kid is right

#### loong21

##### Member
for the 7 marker, did we have to draw the structural formula for the different types of detergents

#### mysterymarkplz

##### Active Member
^yeah it helps to explain their use and environmental impacts

#### loong21

##### Member
so if i didnt, is it still possible to get the 7

no.

#### mysterymarkplz

##### Active Member
hardly anyone gets 7 in those long responses.
to get 7 i rekon you had to talk about
a) saponification, definition of it, what a soap is, its structure
- draw its structure
- show why it is used as a cleaning agent (using all your like-like dissolves and micelles)
- relate that to use (personal hygiene for washing hands and body)
- show it forms scum with Mg Ca
- show its biodegradable

b) Anionic
- structure
- explain cleaning action
- forms soluble complex with Mg/Ca hence doesnt form scum, however the soluble complex are still annoying
- it originally had a non-linear carbon chain making it not biodegradable meaning it was common to see foam clog up waterways, later they rectified this by making the carbon chain linear
- use of phosphates, link to eutrophication
- use of detergent as general cleaning agent

- cationic detergent
- cation + SO3+ and benzene ring structure
- why it is impervious to Ca/Mg
- how it cleans
- Relate properties to use as hair washer
-due to lack of scum formed and a biodegradeable chain, generally non destructive to environment

-non ionic
- structure
- how it cleans
- where it originates from (crude oil), hence putting stress on oil reserves which, talk about environmental problems here
- use in washing machine

there are a few more i may have forgotten but i rekon thats how pedantic they will get. its quite alot to write
-

#### zhertec

##### Active Member
hardly anyone gets 7 in those long responses.
to get 7 i rekon you had to talk about
a) saponification, definition of it, what a soap is, its structure
- draw its structure
- show why it is used as a cleaning agent (using all your like-like dissolves and micelles)
- relate that to use (personal hygiene for washing hands and body)
- show it forms scum with Mg Ca
- show its biodegradable

b) Anionic
- structure
- explain cleaning action
- forms soluble complex with Mg/Ca hence doesnt form scum, however the soluble complex are still annoying
- it originally had a non-linear carbon chain making it not biodegradable meaning it was common to see foam clog up waterways, later they rectified this by making the carbon chain linear
- use of phosphates, link to eutrophication
- use of detergent as general cleaning agent

- cationic detergent
- cation + SO3+ and benzene ring structure
- why it is impervious to Ca/Mg
- how it cleans
- Relate properties to use as hair washer
-due to lack of scum formed and a biodegradeable chain, generally non destructive to environment

-non ionic
- structure
- how it cleans
- where it originates from (crude oil), hence putting stress on oil reserves which, talk about environmental problems here
- use in washing machine

there are a few more i may have forgotten but i rekon thats how pedantic they will get. its quite alot to write
-
For cations I thought it was a trimethylammonium ion?

#### bhatman

##### Member
For cations I thought it was a trimethylammonium ion?
I think he meant to write the quaternary ammonium ion as the head and hydrocarbon tail

#### loong21

##### Member
yeah i did most, if not all of that
just not the visual of te structures