I'm having a lot of problems with predicting reactions and such. It's especially confusing because our teacher is so disorganized and doesn't teach very well. Can anyone help me out? I want to learn this well but I'm not sure where to start. If anyone can give me some advice or tips that'd be great.
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Hmm. It would be better if you could be a bit more specific. By predicting chemical reactions, do you mean in an aqueous solution? Or a reaction happening in another way, i.e. combustion or two gases reacting? If you would narrow it down a bit for me, I should be able to help you out :D.
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I guess it's mostly knowing which rules to use, what to memorize, and mostly in metathesis and combustion reactions, I think. I hope you can help! :)
hey, I can help with combustion reactions, but I've never even HEARD of "metathesis".....
Most combustion rxns involve a hydrocarbon and gaseous oxygen. (They all involve oxygen, but the molecule doesn't have to contain carbon).......
[hydrocarbon] + [oxygen] --> [carbon dioxide] + [water]
and from there just balance... :D
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Thanks, that helps. And I think metathesis reactions are also know as double replacement reactions - most of these involve more than simply knowing that AX + BY becomes BX + AY, it's kinda hard for me to get all those different rules down.
if you still need help, i have all my notes from last year upstairs and it has every rule for predicting reactions, or at least i think so. and i could get them and type it up for you if you'd like. ;)
paige: that sounds like a VERY tempting offer..........
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Forget that we cry
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I wish that I could help you as well, but I'm with AICE here; I've never even heard of metathesis reactions either. I was hoping that you'd need help with reactions in water or combustions...sorry!
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This is a page from reference table that my chem teacher gave my class at the beginning of the year- im only in honors chem, going into ap chem, but i really think these might help. if not i hope someone else can give you wat u need! k bye
Soluble:
• All Nitrates, Acetates, Ammonium,
and Group 1 (IA) salts
• All Chlorides, Bromides, and Iodides,
except Silver, Lead, and Mercury(I)
• All Fluorides except Group 2 (IIA),
Lead(II), and Iron(III)
• All Sulfates except Calcium,
Strontium, Barium, Mercury,
Lead(II), and Silver
Insoluble (0.10 M or greater):
• All Carbonates and Phosphates
except Group 1 (IA) and Ammonium
• All Hydroxides except Group 1 (IA),
Strontium, Barium, and
Ammonium
• All Sulfides except Group 1 (IA),
2 (IIA), and Ammonium
• All Oxides except Group 1 (IA)
Guidelines for Predicting the Products of Selected Types of Chemical Reaction
Key: M = Metal
NM = Nonmetal
1. SYNTHESIS:
a. Formation of binary compound: A + B → AB
b. Metal oxide-water reactions: MO + H2O → base
c. Nonmetal oxide-water reactions: (NM)O + H2O → acid
2. DECOMPOSITION:
a. Binary compounds: AB → A + B
b. Metallic carbonates: MCO3 → MO + CO2
c. Metallic hydrogen carbonates: MHCO3 → MO+ H2O(l) + CO2(g)
d. Metallic hydroxides: MOH → MO + H2O
e. Metallic chlorates: MClO3 → MCl + O2
f. Oxyacids decompose to nonmetal oxides and water: acid → (NM)O + H2O
3. SINGLE REPLACEMENT:
a. Metal-metal replacement: A + BC → AC + B
b. Active metal replaces H from water: M + H2O → MOH + H2
c. Active metal replaces H from acid: M + HX → MX + H2
d. Halide-Halide replacement: D + BC → BD + C
4. DOUBLE REPLACEMENT: AB + CD → AD + CB
a. Formation of a precipitate from solution
b. Acid-Base neutralization reaction
5. COMBUSTION REACTION
Hydrocarbon + oxygen → carbon dioxide + water
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That's a nice list First_Faleyur. Also, if you're interested in getting some more practice Silver Moon - or anyone else for that matter I suppose - There's a nice program called Reaction Master that is really helpful. My Chem teacher got it and it was great practice.
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