Synthesis and Decomposition

A decomposition reaction can be represented as _____________________.

• AB  → A + B

• A + B → AB

• AB + CD → AC + BD

• A + BC → B + AC

A chemical change in which two or more substances react to form a new substance is a ____________________________.

• decomposition reaction

• synthesis reaction

• double displacement reaction

• combustion reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A synthesis reaction can be represented as ________________________.

• AB + CD → AC + BD

• AB → A + B

• A + B → AB

• A + BC → B + AC

Tags

NGSS.MS-PS1-5

This chemical equation for magnesium oxide is an example of what type of reaction?
2Mg + O₂  → 2MgO

• decomposition reaction

• synthesis reaction

• single displacement reaction

• combustion reaction

How do you know this is a decomposition reaction?

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Identify the type of chemical reaction

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion

Tags

NGSS.MS-PS1-2

Which of the following is a synthesis reaction for an acid?

Answer explanation

The correct synthesis reaction for an acid is SO_3 + H_2O -> H_2SO_4, which forms sulfuric acid (H2SO4).

Tags

NGSS.MS-PS1-5

Which type of reaction is shown?

• Combustion

• single replacement

• double replacement

• decomposition

Tags

NGSS.MS-PS1-2

What type of reaction is illustrated below? 2HI --> H₂ + I₂

• synthesis

• decomposition

• single replacement

• double replacement

Tags

NGSS.MS-PS1-2

What type of reaction is illustrated below?

2HI --> H₂ + I₂

• synthesis

• decomposition

• single replacement

• double replacement