Front

What is a Lewis dot structure?

Back

A Lewis dot structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Front

How do you determine the correct Lewis dot structure for a molecule?

Back

To determine the correct Lewis dot structure, count the total number of valence electrons, arrange the atoms, and distribute the electrons to satisfy the octet rule.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to bond in such a way that they have eight electrons in their valence shell, achieving a stable electron configuration.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures that the law of conservation of mass is followed, meaning the number of atoms of each element is the same on both sides of the equation.

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both the reactant and product sides.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products until the number of atoms of each element is equal on both sides.

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula in an equation to indicate how many molecules or moles of that substance are involved.

Front

What is the balanced equation for the reaction of aluminum and iron(II) oxide?

Back

2 Al + 3 FeO → Al2O3 + 3 Fe.

Front

What is the balanced equation for the reaction of phosphoric acid and potassium hydroxide?

Back

H3PO4 + 3 KOH → K3PO4 + 3 H2O.

Front

What is the product of the reaction between zinc and hydrochloric acid?

Back

The balanced equation is Zn + 2 HCl → ZnCl2 + H2.