Single Replacement Reactions Explained

The video tutorial explains single replacement reactions, where an element replaces another in a compound. It covers the general formulas for these reactions, examples with lithium and sodium chloride, and fluorine and iodine. The activity series is introduced to determine reaction feasibility, with examples of reactions that do not occur.

What is a single replacement reaction?

• A reaction where a compound breaks down into elements.

• A reaction where a single element replaces another in a compound.

• A reaction where two compounds exchange elements.

• A reaction where elements combine to form a compound.

In a single replacement reaction, what can the element by itself be?

• Neither a metal nor a nonmetal

• Either a metal or a nonmetal

• Only a nonmetal

• Only a metal

What happens to the element that starts off by itself in a single replacement reaction?

• It evaporates.

• It remains unchanged.

• It forms a new compound.

• It becomes a diatomic molecule.

When lithium replaces sodium in sodium chloride, what is the resulting compound?

• Lithium bromide

• Lithium iodide

• Lithium fluoride

• Lithium chloride

What is the purpose of the activity series in single replacement reactions?

• To determine if a reaction will occur.

• To predict the speed of the reaction.

• To measure the temperature change.

• To determine the color of the reaction.

Which element can replace another in a single replacement reaction according to the activity series?

• An element lower in the series

• An element of the same group

• An element higher in the series

• An element of the same period

In the example with fluorine and iodine, why does the reaction occur?

• Iodine is a metal.

• Fluorine is higher in the activity series than iodine.

• Fluorine is lower in the activity series than iodine.

• Fluorine is a diatomic molecule.

What is the result when lead tries to replace calcium in a compound?

• No reaction occurs.

• Lead successfully replaces calcium.

• Lead forms a new compound with calcium.

• Calcium becomes a diatomic molecule.

Why does iodine not replace chlorine in a compound?

• Chlorine is a metal.

• Iodine is higher in the activity series.

• Iodine is lower in the activity series.

• Chlorine is a diatomic molecule.

What should you check when writing an element by itself in a reaction?

• If it is a noble gas

• If it is radioactive

• If it is a diatomic molecule

• If it is a metal