Chemical Equations Vocabulary

How many reactants are in the chemical equation below?

H₂ + N₂ --> NH₃

• 1

• 2

• 3

• 4

The reaction arrow (-->) in a chemical equation is usually read as ____________.

• equals

• equates

• yields

• reacts

When (s) is written next to a substance in a chemical equation, it , means _________________.

• the substance is soluble

• the substance is a solid

• the substance is a solvent

• the substance is smelly

What is the role of KMnO₄?

• It's a reactant.

• It's a solvent.

• It's a product.

• It's a catalyst.

When a triangle is written above the reaction arrow, it means _________________.

• a precipitate will form.

• a catalyst is required.

• heat is required.

• the substances all undergo phase changes

The large number 2 in front of H₂O₂ is called a __________.

• coefficient.

• subscript.

• superscript.

• transcript.

A chemical reaction arrow that looks like this (↔) indicates that the reaction __________.

• needs a catalyst

• has equal numbers of reactants and products

• needs heat.

• is reversible.

We balance chemical equations in order to show that they obey ____________________.

• Dalton's Law

• the Law of Conservation of Matter

• the Law of Definite Proportions

• the Law of Diminishing Returns

When (aq) is written to the right of a substance in a chemical equation, it means that ________________.

• the substance is a solid

• the substance is dissolved in water

• the substance is a liquid

• the substance is a gas

The blue numbers in the image below represent ________

• solvents

• coefficients

• subscripts

• elements