Question

match the following reaction to the correct description
4al + 3o₂ → 2al₂o₃
2h₂o → 2h₂ + o₂
ba + mgso₄ → baso₄ + mg
hcl + koh → kcl + h₂o
ch₄ + 2o₂ → co₂ + 2h₂o

combustion # synthesis # decomposition # single replacement # double replacement

Explanation:

Step1: Identify reaction type for \(4Al + 3O_2

ightarrow2Al_2O_3\)
Two substances combine to form one product, it's synthesis.

Step2: Identify reaction type for \(2H_2O

ightarrow2H_2 + O_2\)
One substance breaks into two substances, it's decomposition.

Step3: Identify reaction type for \(Ba+MgSO_4

ightarrow BaSO_4 + Mg\)
One element replaces another in a compound, it's single - replacement.

Step4: Identify reaction type for \(HCl + KOH

ightarrow KCl+H_2O\)
The positive and negative ions of two ionic compounds exchange places, it's double - replacement (note: there was a typo in the original equation, it should be \(KCl\) not \(KO\)).

Step5: Identify reaction type for \(CH_4+2O_2

ightarrow CO_2 + 2H_2O\)
A hydrocarbon reacts with oxygen to produce carbon dioxide and water, it's combustion.

Answer:

\(4Al + 3O_2
ightarrow2Al_2O_3\): synthesis
\(2H_2O
ightarrow2H_2 + O_2\): decomposition
\(Ba+MgSO_4
ightarrow BaSO_4 + Mg\): single replacement
\(HCl + KOH
ightarrow KCl+H_2O\): double replacement
\(CH_4+2O_2
ightarrow CO_2 + 2H_2O\): combustion