Equation & Types of Reactions?
Give each reaction type, then complete & balance each equation ;use:
A for direct combination (synthesis/composition) reactions
B for decomposition reactions
C for single replacement reactions
D for double replacement reactions
E for combustion reactions
Example: B 1) 2KClO3 ---> 2KCl + 3O2
____ 2) ___ HI + ___ AgNO3 ---->
____ 3) ___ K2SO4 + ____ Ba(NO3)2 ----->
____ 4) ___ Al + ____ S ----->
____ 5) ___ H2SO4 + ____ Ca ---->
____ 6) ___ Li2SO4 * 2H2O ----->
____ 7) ___ SrCO3 ----->
thanks once again!!
Answer:
2)
(D) HI + AgNO3 ------> AgI + HNO3
Ag and halides have a very strong affinity for each other. They combine to form precipitates.
3)
(D) K2SO4 + Ba(NO3)2 -----> BaSO4 + 2KNO3
Ba and SO4 have a very strong affinity towards each other and a precipitate of BaSO4 is formed. This reaction is used in the detection of sulphates in the laboratory.
4)
(A) 2Al + 3S ----> Al2S3
Aluminium has valency +3 and sulphur has -2. So, the compound formed will be Al2S3, corresponding to Al2O3
5)
(C) H2SO4 + Ca ----> CaSO4 + H2
This reaction is possible because elemental calcium is more reactive than hydrogen.
6)
There is only the hydrolysis reaction taking place in this one.
7)
(B) SrCO3 -----> SrO + CO2
The thermal decomposition of strontium carbonate, which leads to the formation of the oxide and the release of CO2 gas.
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