Chemical Reactions and Oxidation States

The video tutorial explains how to balance a chemical equation involving CuO and H2S, resulting in CuS and H2O. It demonstrates counting atoms to ensure the equation is balanced and identifies the reaction as a double displacement reaction, not a Redux reaction. The tutorial highlights the switch of copper and hydrogen positions, emphasizing the concept of double displacement.

What is the first step in balancing a chemical equation?

• Remove products

• Add more reactants

• Count the atoms of each element on both sides

• Change the coefficients randomly

Which of the following elements has its oxidation state changed in the reaction CO + H2S -> CuS + H2O?

• Sulfur

• None of the above

• Copper

• Oxygen

What is the oxidation state of copper in the reaction?

• -1

• 0

• +2

• +1

What type of reaction is CO + H2S -> CuS + H2O?

• Synthesis

• Decomposition

• Single displacement

• Double displacement

In a double displacement reaction, what happens to the ions?

• They are reduced

• They are exchanged between compounds

• They are oxidized

• They remain unchanged

Which elements switch places in the reaction CO + H2S -> CuS + H2O?

• Oxygen and Sulfur

• Copper and Oxygen

• Hydrogen and Sulfur

• Copper and Hydrogen