Asked by lyne
                NaCl + CuSO4 
to write the product would i just do double replacement to get
Na2SO4 + CuCl2
so the whole thing would be
2NaCl + CuSO4 --> Na2SO4 + CuCl2
            
        to write the product would i just do double replacement to get
Na2SO4 + CuCl2
so the whole thing would be
2NaCl + CuSO4 --> Na2SO4 + CuCl2
Answers
                    Answered by
            DrBob222
            
    Yes, the reaction, if it occurred, is a double replacement and you have written it correctly and balanced it. HOWEVER, it will not react and you should have written it like this.
NaCl + CuCO4 ==> No reaction or as NR.
Reactions occur for one of four reasons.
1. a gas is formed. Neither of the products is a gas so this one is out.
2. a precipitate is formed. Both of the products you wrote are soluble so this one is out.
3. A slightly ionized substance is formed. Both CuCl2 and Na2SO4 are strong electrolytes so this one is out.
4. Some oxidation/reduction reactions but this is not a redox reaction so this one is out.
So, NR.
    
NaCl + CuCO4 ==> No reaction or as NR.
Reactions occur for one of four reasons.
1. a gas is formed. Neither of the products is a gas so this one is out.
2. a precipitate is formed. Both of the products you wrote are soluble so this one is out.
3. A slightly ionized substance is formed. Both CuCl2 and Na2SO4 are strong electrolytes so this one is out.
4. Some oxidation/reduction reactions but this is not a redox reaction so this one is out.
So, NR.
                    Answered by
            lyne
            
    okay how can you tell if they are strong electrolytes or the oxidation one
i understand the others
    
i understand the others
                    Answered by
            DrBob222
            
    Strong electrolytes versus weak electrolytes. The question, really is how can you know a weak electrolyte. Look in a set of tables called ionization constants. There is a table for weak acids and another one for weak bases. If the material is listed there it is a weak electrolyte. If not it is a strong electrolyte. Most salts are strong electrolytes. Most organic compounds are weak electrolytes or non-electrolytes. On the subject of redox reactions, you haven't covered those yet, I don't expect, so don't worry about them until they arrive. The other three will get you through most reactions, even some of those that are redox reactions.
 
    
                    Answered by
            lyne
            
    Ca(s) + Br2(l) --> CaBr2 is synthesis
my teacher also said that the cause of the reaction is stable electron configuration
is that the same thing as the electrolytes one
    
my teacher also said that the cause of the reaction is stable electron configuration
is that the same thing as the electrolytes one
                    Answered by
            DrBob222
            
    Answered above as a separate post.
    
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