Chemistry

I'm having a bit of trouble translating what I see when I perform the experiment into actual chemical reactions. In one experiment, Magnesium is placed in Hydrochloric acid, and a burning splint is extinguished. So I think that it is producing Magnesium chloride + hydrogen?

The ones I am blank with is Carbon Dioxide bubbling through a beaker of water. Blue litmus turns red, so it must be acidic. Carbonic acid? There's also sodium hydroxide + ammonium carbonate. I think ammonia gas is produced because of the smell (I think). But what kind of reaction is that? What does that leave? I'm not sure......

Acetylene is burned. C2H2 + O2, is that correct? I think the product has carbon dioxide in it? Carbon Dioxide + Water? Is that the product? But then what type of reaction would that be? Just combustion?

Finally ammonium carbonate + hydrochloric acid. I have no clue about this one.

Thanks in advance...

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  1. Mg + 2HCl ==> MgCl2 +H2. The H2 will burn if enough oxygen is present or will explode if a open flame is placed near the mouth of a small test tube. A single displacement reaction.

    You are correct that H2O + CO2 produces H2CO3. This is a synthesis reaction.

    Yes, the odor is NH3.
    NaOH + (NH4)2CO3 ==> Na2CO3 + NH3 + H2O. This is a double displacement reaction followed by decomposition of an intermediate of NH4OH. Actually, NH4OH doesn't exist but it is much easier to see what's going on if we assume it forms as an intermediate.
    NaOH + (NH4)2CO3 ==> Na2CO3 + NH4OH. You balance. This is the double displacement part. Then the hypothetical NH4OH decomposes as NH4OH ==> NH3 + HOH.

    C2H2 + O2 ==> CO2 + H2O. You balance. This is a combustion reaction. Also it is an oxidation/reduction reaction.

    Here are a three sites that will help you in classifying reactions. One lists 4 types and one lists 6 but don't let that confuse you.

    http://misterguch.brinkster.net/6typesofchemicalrxn.html

    http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype.htm

    (Broken Link Removed)

    Thanks for using Jiskha

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