U7 L4 Single Replacement and Activity Series

What is a single replacement reaction?

• A reaction that only occurs in organic chemistry

• A reaction where two elements combine to form a compound

• A reaction where an ionic compound reacts with an element, producing another ionic compound and element

• A reaction where two compounds exchange elements

What charge does zinc always have in an ionic compound?

• +1

• -1

• +2

• -2

How do you balance a reaction where the charges do not cancel each other out?

• By adding water to the reaction

• By changing the charges of the elements

• Using the crisscross method to balance the charges

• Leaving the reaction as it is

What is the result when sodium reacts with zinc oxide?

• Sodium zincate

• Zinc sodium oxide

• Sodium oxide and zinc

• No reaction occurs

In the reaction between sodium, iodine, and bromine, what is the state of iodine in the product?

• Iodine remains as I-

• Iodine becomes I2

• Iodine is not present in the product

• Iodine becomes IO3-

How do you ensure a chemical reaction is balanced?

• By increasing the temperature of the reaction

• By adding catalysts to the reaction

• By ensuring there is an equal number of each type of atom on both sides of the equation

• By changing the reactants

What is the product when magnesium reacts with hydrochloric acid?

• Magnesium chloride and hydrogen gas

• No reaction occurs

• Magnesium hydroxide and chlorine gas

• Hydrogen chloride and magnesium

What is the state of hydrogen in the product of magnesium reacting with hydrochloric acid?

• Aqueous

• Liquid

• Solid

• Gas

What method is used to balance charges in a single replacement reaction?

• The elimination method

• The addition method

• The crisscross method

• The substitution method

Why is it important to balance chemical reactions?

• To comply with the law of conservation of mass

• To speed up the reaction

• To change the reaction pathway

• To use all reactants completely