A/L Chemistry help.simple question.but...

[Slesh]

anumapanaya nokara baane..
1) uba na2s2o3 wala saandranaya daala ty 4.5i ki..
2) I2 mol gana hoyanna na2s2o3 mol gana 2n bedanawa.. wadi karanne naa..
3) oya hadala tyenne 50cm3 th ekkama CCl4 mix karala eken 25K aragena kiyala.. mama haduwe 50ka I2 diyakarala eken 25k CCl4 ekka kalawamm karala. e 25ma anumapanaya ka kiyala..

3weni eka thanikara prashne awlak.. prashne pahadili naa..
anith eka mol athara anupathaya ganna purudu wenna epa(waradilawath ganna epa) puluwan hama welawema saandrana athara anupaathayata yanna..
mokada Kd artha dakwala tyenne e widiyata..

1-hari hari 4.5 thama athana post eke podi printing mistake ekak
2-ow 2n bedenawa.eka dan theruna mata.
3-hmm ow eka prashne awlak.

poth wala thiyenne eka eka widyata ne.ekai mole athara anupatheth gaththe.but ow parima samana nan ara sandrana athara anupathe thama ganne one

 

[Slesh]

hari ehenan api hithamu H2O saha CCl4 50cm3 gaane thiyenawa kiyala.
1)palaweniyata I2 H2O 50cm3 ka diyakaranawa.

2)eken 25cm3 k Na2S2O3 ekka anumapanaya karanawa.

ethakota eke thiyena I2 ,Na2S2O3 ekka prathikriya karanawa
I2+2Na2S2O3----->Na2S4O6+2NaI
(mata penne oyata mole ganan wala anupathaya patalenawa wage.balannako malli uda sameekaranaye I2 mole gaana wage 2gunayak Na2S2O3 thiyenawa.ethakota oya Na2S2O3 mole gaana dannawanan,e wage 1/2k thamai I2 mole gaana wenne)

3)apita Na2S2O3 mole gaana hoyaganna puluwanne(n=cv)

4)eken baagayak thamai I2 mole gaana
e thamai H2O 25cm3 ka thiyena I2 mole gaana.50cm3 ka e wage 2gunayak thiyenawa.eka x kiyala hithamu

5)kD=[I2]CCl4/[I2]H2O
e nisa CCl4 walata giya I2 mole gaanath hoyaganna one

6)arambaka I2 mole gaana hoyaganna(n=m/M)
eka y kiyala hithamu

7)dan y-x=CCl4 stharayata giya mole gaana.

8)dan parima samaana nisa kelinma kD=I2 mole gaana CCl4/I2 mole gaana H2O
daanna puluwan.kD=y-x/x

(harida danna poddak hadala balanna)

අයඩීන් ජලය 50ක ඩියකරලා CCl4 එක්ක කලවම් කරලා එකෙන් 25ක් ගන්නවද? නැත්නම් ජලය 50ක දිය කරලා එකෙන් 25ක් අරන් CCl4 එක්ක මිශ්‍ර කරලා ඒ 25ම අනුමාපනය කරනවද කියලා නෑනේ...
e nisa hadanna baa..

ow ea sytem ekata thama gaana hadanna wenne wena hadanna kramayak na...Anyway Thank you "Good heart"

"Mottaya" oya kiyana awla gaane thiyenawa..

 

[mottaya]

1-hari hari 4.5 thama athana post eke podi printing mistake ekak
2-ow 2n bedenawa.eka dan theruna mata.
3-hmm ow eka prashne awlak.

poth wala thiyenne eka eka widyata ne.ekai mole athara anupatheth gaththe.but ow parima samana nan ara sandrana athara anupathe thama ganne one

parima samaana nam mol anupaathaya gannatha PULUWAN...
eth ehema ganne nathi tharamata hondai..(e kiyanne saandrana anupaathaya ganna.)
eth oya mol anupaathaya gannawanam ANIWARYENMA eka paper eke kiyanna," draawana deke parimaa samaana nisa saandrana athara anupaathaya, mol anupaathayata ARNUROOPA or samaana we" ki.
ehema liwwath aniwaryen Kd= [I2(CCl4)] / [I2(aq.)] kiyana eka aniwa liyanna. mokada sameekaraneta lakunu denawa..
oyage anthima uththare waradunoth oya podi podi lakunu ekathu wela, prashne mulu lakunu gaanen saahena gaanak ekathu karaganna puluwan..

 

[mottaya]

me aug wala exam wenna athi neh?
hondata liyapanz...

 

[Slesh]

uththare saamanyen 2weni dashamasthanayen wenas wenne naa..
samanyen 4 weni dashamen wage thamai wenas wenne..
dashama ganan ena uththareka samanyen paraasayak denawa..
wadiya hithanna epa.. 2n wadi kalaanam oyage uththare kohomath waradie..
me prashneth patta chaater..

එකෙන්ම කියන්න පුළුවන් මල්ලි ප්‍රශ්නෙ අවුලක් තියෙනවා....

මේ හදල තියෙන විදිහෙත් පොඩි අවුල් තැන් දෙකක් තියෙනවා

දෙකෙන් බෙදන්න ඕනේ(වැඩිකරන එක වැරදියි)
I2 වල පරමාණුක භාරය 254 වෙන්න ඕනේ(I පරමාණු දෙකක් තියෙන නිසා)

huta.. mama net eke baluwama awe 127 ki.. mama eka daala haduwe..
owa mathaka naa ne..

ow ehema kalawam karana widiha deela na thamai
I2 H2O 50cm3 ka diya karala eka CCl4 wala dammoth witharane ithin ithuru mole gaana CCl4 stharayata yanne.e nisa apita ehema hithala thamai gaana hadanna wenne.me gaane hama deyakma deela na.

Thanks wade dan meter

 

[Slesh]

එනවද, මම හදල බැලුවෙ නෑ

ප්‍රශ්නෙ හදපු එකා බාගෙට හදල තියෙන්නෙ, ඉතුරු ටික අපි තනියම හිතාගන්න ඕනේ, මේ වගේ එක ප්‍රශ්නයක් ඇති මුළු පේපර් එකම කෙලවෙන්න..

86.48 enawa.. 86.44lu uththare..

sirawata..karumeta hari ekaka hiraunoth anaathai..

he he..

Sira kathawa machan..chater ganan.oya wage ganak exam eke set unoth sorry ma thama giya parath anukalanaya chater ganak awa

 

[Slesh]

Me kiyala tiyana widiha haari machan. wadiya hithann n2wa deela tiyana stoykiyomithika anupaatha walin uththara araganna. onawa ta wada owa gana hithanna giyama puluwan eath bari wenawa...

ow machan mata ea scene eka theruna. eka thama onawata wadiya hithanna giyama thama me okkoma case. Thanks machan

 

[Slesh]

parima samaana nam mol anupaathaya gannatha PULUWAN...
eth ehema ganne nathi tharamata hondai..(e kiyanne saandrana anupaathaya ganna.)
eth oya mol anupaathaya gannawanam ANIWARYENMA eka paper eke kiyanna," draawana deke parimaa samaana nisa saandrana athara anupaathaya, mol anupaathayata ARNUROOPA or samaana we" ki.
ehema liwwath aniwaryen Kd= [I2(CCl4)] / [I2(aq.)] kiyana eka aniwa liyanna. mokada sameekaraneta lakunu denawa..
oyage anthima uththare waradunoth oya podi podi lakunu ekathu wela, prashne mulu lakunu gaanen saahena gaanak ekathu karaganna puluwan..

me aug wala exam wenna athi neh?
hondata liyapanz...

Thanks a lot for your help machan.dangaththa eka hodai.ea wage gaank awoth paper eke eka liyannam. ow ehema hamba wena lakunu tika shena watinawa.

ow me aug 5 exam
Ela thanks machan. (Y)

 

[amila256]

Sira kathawa machan..chater ganan.oya wage ganak exam eke set unoth sorry ma thama giya parath anukalanaya chater ganak awa

හ්ම්ම්ම් හ්ම්ම්ම් ආරන්චි උනා සිද්දිය,
අම්මප මේ පේපර් හදන උන් උල තියන්න ඕනේ බන්

 

[amila256]

ow me aug 5 exam

හොඳට exam ලියහන් මල්ලි...

 

[Slesh]

awasana nigamanaya :

1. stoichiyo mithika anupaatha prashne wisadina.

2.anik gataluwe 2 n beda nothibeemath 254 wenuwata 127n beda thibeemath pilithura nolabeemata hethu wiya.

3.Thawada eama gataluwe waraddak thibe.

4.me ha sambanda anik da karunuda danaganna labini.

Kohomahari wade goda. Udaw karapu saama denatama bohoma isthuthiy kiyala kiyanawa.

 

[Slesh]

හ්ම්ම්ම් හ්ම්ම්ම් ආරන්චි උනා සිද්දිය,
අම්මප මේ පේපර් හදන උන් උල තියන්න ඕනේ බන්

හොඳට exam ලියහන් මල්ලි...

hmm ow

Thank you very much ayya

 

[Good Heart]

awasana nigamanaya :

1. stoichiyo mithika anupaatha prashne wisadina.

2.anik gataluwe 2 n beda nothibeemath 254 wenuwata 127n beda thibeemath pilithura nolabeemata hethu wiya.

3.Thawada eama gataluwe waraddak thibe.

4.me ha sambanda anik da karunuda danaganna labini.

Kohomahari wade goda. Udaw karapu saama denatama bohoma isthuthiy kiyala kiyanawa.

chemistry mcq paper ekatanan echchara wela madi wenne na
monawa unath palaweniyata theory walin ahala thiyena prashna karala inna
eeta passe anthimatama oya ganan hadanna thiyaganna
essay eketh inorganic prashna walata uththara liyala physical walata yana eka hondai.thamanta bari prashna thiyenawanan ewage alila inna epa
any way hondata study karala hondata exam karanna.good luck

 

[Slesh]

chemistry mcq paper ekatanan echchara wela madi wenne na
monawa unath palaweniyata theory walin ahala thiyena prashna karala inna
eeta passe anthimatama oya ganan hadanna thiyaganna
essay eketh inorganic prashna walata uththara liyala physical walata yana eka hondai.thamanta bari prashna thiyenawanan ewage alila inna epa
any way hondata study karala hondata exam karanna.good luck

ow eka aththa Chemistry second paper ekata thama wela madi wenne. man inorganic wadiya karanna balaporoththuwak nehe habai..
Thank you very much!!

 

[nOoB_SL]

podu stoichiometric scene 1
X + Y ----> A + B nam
1 : 1 1 : 1 r8?

a wagema; 2P + Q ----> 3S + T wage nam
2 : 1 3 : 1 r8?
a kyanne P 2 mol & Q 1 mol waya weddi S 3 mol & T 1 mol hadenawa
wena widiyakin qwoth;
P 2 mol waya weddi Q 1 mol waya wenna ona PLUS S 3 mol hadeddi T 1 mol hadenawa r8?

so your question 1;
equation 1a NaOH : HBr = 4 : 2
= 2 : 1
AND 1HBr ----> H+ + Br- a nisa NaOH : Br- = 2 : 1 harida?
ethakota NaOH 2 mol wayaweddi Br- 1 mol wayawenawa (or in this case hadennath puluwan)
a nisa Br- mol = NaOH mol/2

Q2; same theory
I2 mol = S2O32- mol/2 hari!!!
mokada I2 : S2O32- = 1 : 2
anisa thiosulfate mol 2k wayaweddi I2 mol 1k wayawenawa hari??
therunada danne na.mama nam A/L kale 2011

 

[kUddA_roX]

yeah tru tru

 

[kUddA_roX]

machan prashne wisadunane ehenan. mama onlyn echchara wela hitye naa.
Then all the best for your examz. Nail it!!!!!

 

[Slesh]

machan prashne wisadunane ehenan. mama onlyn echchara wela hitye naa.
Then all the best for your examz. Nail it!!!!!

Its ok ow machan.
Thank you very much machan!!!

 

[Slesh]

bump

ridila hodatama ridila

 

[hancok]

ridila hodatama ridila

dawas 7 kata pera Ph agaya iganagamu