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juelchasse
27.10.2020 •
Chemistry
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Ответ:
cation are positive charged valances so the answers include B) Al³+ (aluminium) and D) Mg²+ (magnesium)
Ответ:
cation are positive charged valances so the answers include B) Al³+ (aluminium) and D) Mg²+ (magnesium)
Explanation:
Ответ:
Each reaction has its own characteristics which can be determined from the reactants and products
Further explanationEvery chemical reaction involves a compound consisting of reactants and products
Reactants are compounds that react and form new compounds called products
There are several forms of reactions that can occur, including single replacement, double replacement, synthesis, decomposition, etc.
A. substances after the arrow are called 1 products
The product compounds in this reaction are: CO₂ + H₂O
B. which substances are the reactants : sodium + water
and The product compounds : sodium hydroxide + hydrogen gas
Reaction
2Na(s) + 2H₂O → 2NaOH(aq) + H₂(g)
C. Mg + Fe₂O₃ → Fe + 3 MgO is an example of single replacement :one element replaces the other elements of a compound to produce new elements and compounds
D. Ca(OH)₂ + Al₂(SO₄)₃ → CaSO₄ + Al(OH)₃ is an example of double replacement : there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product
E. PbSO₄->PbSO₃ + O₂ is an example of decomposition : One compound breaks down into 2 components
F.C₂H₄ + O₂ → CO₂ + H₂O is an example of combustion : when Oxygen combines with hydrocarbon