Author Topic: Chemistry paper 1 help  (Read 12009 times)

Offline The Golden Girl =D

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Re: Chemistry paper 1 help
« Reply #30 on: May 24, 2010, 06:01:19 pm »
y doesnt copper react directly wid hcl to form copper chloride?

cuz copper is below hydrogen in the reactivity series ...it can't displace Hydrogen ..therefore ..no reaction  ;)
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Offline Weaam

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Re: Chemistry paper 1 help
« Reply #31 on: May 24, 2010, 06:03:09 pm »
i know im asking too much, im just panicking real hard  :-[
so can anyone please tell me the products when:
Acid + Metal -->
Acid + Base -->
Acid + Metal Carbonate -->
How metal nitrates breakdown
and how the boiling and melting points change down group of group VII
Really sorry for the trouble  :(
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Offline blackberry

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Re: Chemistry paper 1 help
« Reply #32 on: May 24, 2010, 06:07:18 pm »
cuz copper is below hydrogen in the reactivity series ...it can't displace Hydrogen ..therefore ..no reaction  ;)

thank you!!!this question's been roaming on my mind since 6 months!!!
You gotzz to cheel!!!! tuh-may-toez and un-yunz!!!
:)

Offline The Golden Girl =D

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Re: Chemistry paper 1 help
« Reply #33 on: May 24, 2010, 06:07:57 pm »
i know im asking too much, im just panicking real hard  :-[
so can anyone please tell me the products when:
Acid + Metal -->metal salt + hydrogen
Acid + Base -->metal salt+ water
Acid + Metal Carbonate -->metal salt +carbon dioxide+water
How metal nitrates breakdown
and how the boiling and melting points change down group of group VII
Really sorry for the trouble  :(

as we go down the group of halogen , m.p. and b.p. is increasin


metals of group 1 , well they give u following:
metal nitrate ( exceot for Li)--> metal nitrite + oxygen

metals for group two (and Li) and transition metals give u :

metal nitrate --> metal oxide + nitrogen gas + oxygen

(remeber group TWO means TWO gases ...group ONE means ONE gas given off ;) )

don't panic ...relax and have faith and god and have sonfidence in urself mate  ;)


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Offline The Golden Girl =D

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Re: Chemistry paper 1 help
« Reply #34 on: May 24, 2010, 06:12:15 pm »
thank you!!!this question's been roaming on my mind since 6 months!!!

i used to too :P..but then i asked and said ( i'm gonna get to the bottom of this and i did ::))

np  8)
Verily, in the remembrance of Allah do hearts find rest(13:28)

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Offline blackberry

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Re: Chemistry paper 1 help
« Reply #35 on: May 24, 2010, 06:12:58 pm »
oooo......nuther question!!!
how do you know which gases are soluble or insoluble??
and my textbuk said dat Phosphorus pentoxide is soluble, while on anuder page it said dat most oxides/hydroxides r insoluble xcept foh
ammonium,sodium,potassium n calcium!! how wud we be able to tell whether stuff like this is soluble or not?
You gotzz to cheel!!!! tuh-may-toez and un-yunz!!!
:)

Offline blackberry

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Re: Chemistry paper 1 help
« Reply #36 on: May 24, 2010, 06:15:23 pm »
i used to too :P..but then i asked and said ( i'm gonna get to the bottom of this and i did ::))

np  8)

teeheee!!!ur great help!!!
You gotzz to cheel!!!! tuh-may-toez and un-yunz!!!
:)

Offline haris94

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Re: Chemistry paper 1 help
« Reply #37 on: May 24, 2010, 06:18:49 pm »
oooo......nuther question!!!
how do you know which gases are soluble or insoluble??
and my textbuk said dat Phosphorus pentoxide is soluble, while on anuder page it said dat most oxides/hydroxides r insoluble xcept foh
ammonium,sodium,potassium n calcium!! how wud we be able to tell whether stuff like this is soluble or not?

u hv to know the solubility guide
its given here https://studentforums.biz/index.php/topic,7663.0.html
WHAT WE DO IN LIFE ECHOES AN ETERNITY

Offline The Golden Girl =D

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Re: Chemistry paper 1 help
« Reply #38 on: May 24, 2010, 06:20:09 pm »
oooo......nuther question!!!
how do you know which gases are soluble or insoluble??
and my textbuk said dat Phosphorus pentoxide is soluble, while on anuder page it said dat most oxides/hydroxides r insoluble xcept foh
ammonium,sodium,potassium n calcium!! how wud we be able to tell whether stuff like this is soluble or not?


aha ahris is right  ;)
Verily, in the remembrance of Allah do hearts find rest(13:28)

Please, Don't forget to Include GG in your Prayers =D

Offline red_911

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Re: Chemistry paper 1 help
« Reply #39 on: May 24, 2010, 06:22:33 pm »
i have an important question  :D
if lead is above hydrogen in the reactivity series then why is lead formed instead of hydrogen in the electrolysis of aqueous lead nitrate ????

Offline Weaam

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Re: Chemistry paper 1 help
« Reply #40 on: May 24, 2010, 06:24:09 pm »
I thought group 2 means group II in the periodic table and same for group I ???
Also could u give me the products of:
Acid + Base -->
Acid + Metal -->
Acid + Metal carbonate -->
Sorry for all the trouble  :(
- The man who smiles when things go wrong has thought of someone to blame it on. - Robert Bloch.
-I saw weird stuff in that place last night. Weird, strange, sick, twisted, eerie, godless, evil stuff... and I went in. - Homer
+ Rep me if i have been of any assistance to you ;D

Offline The Golden Girl =D

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Re: Chemistry paper 1 help
« Reply #41 on: May 24, 2010, 06:25:02 pm »
I thought group 2 means group II in the periodic table and same for group I ???
Also could u give me the products of:
Acid + Base -->
Acid + Metal -->
Acid + Metal carbonate -->
Sorry for all the trouble  :(
i answered it , check prior replies
Verily, in the remembrance of Allah do hearts find rest(13:28)

Please, Don't forget to Include GG in your Prayers =D

Offline The Golden Girl =D

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Re: Chemistry paper 1 help
« Reply #42 on: May 24, 2010, 06:27:47 pm »
i have an important question  :D
if lead is above hydrogen in the reactivity series then why is lead formed instead of hydrogen in the electrolysis of aqueous lead nitrate ????

By the way when u have any AQ solutions then what u do is that u gotta kno the followin rules

1. when the metal is Cu or Ag then they go to the Cathode  but if other metals hence they form metal hydroxide

2.if the gas is a halogen then it goes to the Anode  ...if not a halogen then OH- goes to the Anode givin out Oxygen .i'll give u the formula , wait

4OH- --> 2H2O +O2+4e-
« Last Edit: May 24, 2010, 06:30:15 pm by the golden girl »
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Offline haris94

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Re: Chemistry paper 1 help
« Reply #43 on: May 24, 2010, 06:28:12 pm »
your right....group I is 1, group II is 2, and so on

acid + base = salt + water

acid + metal = salt + hydrogen

acid + carbonate = salt + carbon dioxide + water
 
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Offline Weaam

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Re: Chemistry paper 1 help
« Reply #44 on: May 24, 2010, 06:34:08 pm »
Thanks dude ;)
- The man who smiles when things go wrong has thought of someone to blame it on. - Robert Bloch.
-I saw weird stuff in that place last night. Weird, strange, sick, twisted, eerie, godless, evil stuff... and I went in. - Homer
+ Rep me if i have been of any assistance to you ;D