What is the chemical equation for Cu + O2 ; CuSO4 . 5H2O ; Fe + HCl ; Fe+ CuSO4 ; FeCl3+KCNS ; FeCl3+K4Fe(CN)6
Answer:
Alright, I will be including the phase of each substances in the chemical equation for a clearer idea.
s - solid
l - liquid
g - gas
aq - aqueous
2Cu (s) + O2 (g) --> 2CuO (s)
This process is known as composition or combination. When two substances become one, it's known as composition or combination.
CuSO4 . 5H2O (aq) --> CuSO4 (s) + 5H2O (g)
This process is known as decomposition. When a substance breaks into two or more, it's known as decomposition, the opposite of composition.
Fe (s) + 2HCl (aq) --> FeCl2 (aq) + H2 (g)
This process is known as single displacement. Single displacement is where only one substance is swapping between the two substances.
Fe (s) + CuSO4 (aq) --> FeSO4 (aq) + Cu (s)
This process is known as single displacement. Single displacement is where only one substance is swapping between the two substances.
For your information, KSCN is known as potassium thiocynate. Potassium thiocynate is mainly used to identify cation like Fe2+, Fe3+ and so on. When reacting with Fe3+ ion, you will notice that the solution mixed will be red.
FeCl3 (aq) + 3KSCN (l) --> 3KCl (aq) + Fe(SCN)3 (aq) [red in colour]
This process is known as double displacement. Double displacement is where two substances at a time are swapping between the other two substances.
For your information, K4Fe(CN)6 is known as potassium hexacyanoferrate(II). It is also used to identify cation like Fe2+. Fe3+ and so on. When reacting with Fe3+ ion, a deep blue precipitate will be created in the solution.
FeCl3 (aq) + K4Fe(CN)6 (l) --> 3KCl (aq) + KFe[Fe(CN)6] (s) [deep blue or "Prussian blue" in colour]
This process is known as double displacement. Double displacement is where two substances at a time are swapping between the other two substances.
Hope you understand what I said here~!!
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