Single Replacement Reactions and Reactivity

The video tutorial covers single replacement reactions, explaining how one element replaces another in a compound. It introduces the activity series, a list of metals and non-metals ranked by reactivity, which helps predict whether a reaction will occur. The tutorial provides examples of reactions, demonstrating how to use the activity series to determine if a reaction is possible and how to balance the resulting chemical equations.

What is a single replacement reaction?

• A reaction where two elements combine to form a compound.

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

• A reaction where two compounds exchange partners.

• A reaction where a compound breaks down into two elements.

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

• To measure the speed of reactions.

• To identify the reactivity of metals and non-metals.

• To predict the temperature change in reactions.

• To determine the color change in reactions.

Which element is the most reactive according to the activity series?

• Gold

• Lithium

• Barium

• Calcium

In a single replacement reaction, what must be true for a metal to replace another metal?

• The replacing metal must be heavier.

• The replacing metal must be the same size.

• The replacing metal must be more reactive.

• The replacing metal must be less reactive.

Can magnesium replace calcium in a single replacement reaction?

• No, because magnesium is less reactive.

• No, because they are both non-metals.

• Yes, because magnesium is more reactive.

• Yes, because they are both metals.

What happens if a non-metal is less reactive than the one it tries to replace?

• No reaction occurs.

• The reaction occurs with a temperature change.

• The reaction occurs with a color change.

• The reaction occurs with a gas release.

Which non-metal is the least reactive according to the activity series?

• Iodine

• Bromine

• Chlorine

• Fluorine

In a successful single replacement reaction, what must be done after predicting the products?

• Measure the temperature change.

• Balance the chemical equation.

• Add a catalyst.

• Change the solvent.

What is the charge of potassium in a compound?

• +1

• -1

• +2

• -2

Which of the following is a diatomic molecule?

• Strontium

• Magnesium

• Chlorine

• Potassium