Question

question 8 of 10
points possible: 1.00
what is the balanced chemical equation for the decomposition of hydrogen peroxide (h₂o₂)?
select one.
h₂o₂ + ki → h₂o + kio
h₂o₂ → h₂ + o₂
2h₂o₂ → 2h₂o + o₂
h₂o₂ → 2h + o₂

Explanation:

Step1: Analyze the decomposition reaction

Decomposition of hydrogen peroxide (\(H_2O_2\)) means it breaks down into simpler substances. The general form of decomposition reaction for \(H_2O_2\) is \(H_2O_2
ightarrow H_2O + O_2\).

Step2: Balance the equation

Count the number of atoms. For un - balanced equation \(H_2O_2
ightarrow H_2O + O_2\), on the left side: \(H = 2\), \(O=2\); on the right side: \(H = 2\), \(O = 3\).
Multiply \(H_2O_2\) by \(2\) and \(H_2O\) by \(2\) to get \(2H_2O_2
ightarrow 2H_2O+O_2\). Now, for \(H\): \(2\times2 = 4\) (left) and \(2\times2 = 4\) (right); for \(O\): \(2\times2=4\) (left) and \((2\times1)+2 = 4\) (right).

Answer:

\(2H_2O_2
ightarrow 2H_2O + O_2\) (the second option in the given choices)