Chemical Equations and Reactions Worksheet

Each substance to the right of the arrow in a chemical equation is a(n) .

• Catalyst

• Product

• Reactant

• Inhibitor

The numbers that go before symbols and formulas in a chemical equation are .

• Superscripts

• Subscripts

• Catalysts

• Coefficients

A(n) chemical equation has the same number of atoms of each element on each side of the equation.

• unbalanced

• balanced

• simple

• complex

Tags

NGSS.MS-PS1-5

If something is burned, a reaction has occurred.

• double displacement

• single displacement

• combustion

• synthesis

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

In a chemical equation, the symbol that means dissolved in water is .

• (s)

• (l)

• (g)

• (aq)

What type of reaction is the following chemical reaction? CH₃CH₂OH + 3O₂ → 2CO₂ + 3H₂O

• double-displacement

• single-displacement

• combustion

• synthesis

Which chemical reaction represents a double displacement reaction?

• 2Na + Cl₂ → 2NaCl

• 2KClO₃ → 2KCl + 3O₂

• Zn + 2HCl → ZnCl₂ + H₂

• NaOH + HCl → NaCl + H₂O

A teacher wants to demonstrate a chemical reaction for her students. Which activity below would best demonstrate a chemical reaction?

• Placing metal in an acid to create gas

• Measuring the densities of water and ice

• Melting a solid piece of aluminum

• Filling a balloon with helium gas

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation of Mass states

• Mass never stays constant

• Mass is always added during a chemical change

• Mass is always lost during a chemical change

• Mass is not lost or created during a chemical change

Tags

NGSS.MS-PS1-5

Which situation provides the best evidence that a chemical reaction is taking place?

• A metal strip bends when heated

• A solution freezes in the freezer

• Two solutions mixed in a beaker produce a solid

• A chemical is dissolved in water

Tags

NGSS.MS-PS1-2