[piotrkol1]

Are they acid-base neutralization, precipitation, redox, or none of those three choices? I haven't been able to find any help in my text book.

1.) Ba(ClO3)2 -> BaCl2 + 3O2

2.) 2NaCl + K2S -> Na2S + 2KCl

3.) CaO + CO2 -> CaCO3

4.) KOH + AgCl -> KCl + AgOH

5.) Ba(OH)2 + 2HNO2 -> Ba(NO2)2 + 2H2O

Thanks!

[Borek]

You have to show your attempts at solving the question to receive help. This is a forum policy.

At least some are obvious. If you have an acid and a base, what kind of reaction would you expect? What is characteritic for redox reaction?

[someuser]

Are they acid-base neutralization, precipitation, redox, or none of those three choices? I haven't been able to find any help in my text book.

1.) Ba(ClO3)2 -> BaCl2 + 3O2

2.) 2NaCl + K2S -> Na2S + 2KCl

3.) CaO + CO2 -> CaCO3

4.) KOH + AgCl -> KCl + AgOH

5.) Ba(OH)2 + 2HNO2 -> Ba(NO2)2 + 2H2O

1&2- redox
3- not sure
4- precipitation (AgOH)
5-acid-base neutralization

[AWK]

2 - not redox
4 AgCl is also insoluble in water

1 and 4 correct

[someuser]

2 - not redox
4 AgCl is also insoluble in water

1 and 4 correct

I'm confused on #2. I thought ionic compounds (metals combining with non-metals) were oxidation-reduction reactions. It's a double displacements reaction (AB+CD ----> AD + CB) but I do not think sodium sulfide or potassium chloride are precipitates

#3 is a synthesis or combination reaction (A +B ----> AB which is a sub-category of transfer of electrons)... Technically number one is a combustion reaction (A + O2 ----> AxAy which is also a sub-category of transfer of electrons).

On question #4, I've had questions on chemistry tests where one of the reactants were "assumed" to be (aq) even when the solubility rules would indicate they would be (s).

I'm new and love chemistry so feedback is welcomed even though this isn’t my topic :-)  

[rabolisk]

2 is somewhat confusing to me too, because it doesn't appear that any of those species are insoluble in water. It is like a precipitation.. except there will be no precipitate (unless huge amounts are used). Nevertheless, it is not redox.

3 is a synthesis reaction but it is interesting. First, it is not a redox reaction. Not all synthesis/combination reactions are redox reactions. On a test I would probably choose none of the above, although I can make a case for it being acid/base neutralization (Lewis acid/base). I suppose I can stretch it out and call it precipitation, but there are no ions, so I would not choose that.

5 is correct.