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 what are these equations examples of? ZnBr2 (aq) + 2AgNO3 (aq) -->Zn(NO3)2 (aq) +...

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mbroxz | Student, Grade 11 | eNotes Newbie

Posted September 28, 2012 at 3:13 AM via web

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 what are these equations examples of?

ZnBr2 (aq) + 2AgNO3 (aq) -->Zn(NO3)2 (aq) + 2AgBr (s)

KBr (aq) + AgNo3 (aq) --> AgBr (s) + KNO3

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jerichorayel | College Teacher | (Level 1) Senior Educator

Posted September 28, 2012 at 5:08 AM (Answer #1)

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To better illustrate the problem, we will try to enumerate the different types of reaction.

1. Combustion - reaction with oxygen to form Carbon dioxide and water

2. Synthesis - two or more simple compounds joined together to form a more complicated compound.

                   A + B  ---> AB


3. Decomposition- opposite of synthesis reaction.

                   AB -----> A + B


4. Single - one element displace/replace an element in a compound

                   AB   + C    ---->  AC

5. double - it is a switching places of ions during reaction.

                  AB  +  CD   ----> AD  + CB

6. Acid base - a type of double replacement wherein H+ and OH- is involved. Salts are formed in this type of reaction.

                 HCl  + NaOH  ----->   NaCL  + H2O


By inspection we can see that:


ZnBr2 (aq) + 2AgNO3 (aq) -->Zn(NO3)2 (aq) + 2AgBr (s)

is a double displacement reaction. We can also call this as precipitation reaction since AgBr precipitates in the reaction (it is denoted by a letter (s) in the chemical reaction).


KBr (aq) + AgNo3 (aq) --> AgBr (s) + KNO3

similarly, this is also a double replacement reaction/precipitation reaction.



hope this helps :)

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