Chemical Reactions

Which is the name of the kind of solid substance formed in this figure?  

• aqueous 
• precipitate
• acid
• synthesis 

Tags

NGSS.MS-PS1-2

Which represents sodium chloride dissolved in water?

• H2O(l) + NaCl(s)

• NaCl (aq) 

• NaCl (l) 

• NaCl (s)

Which of the following compounds will not disassociate and dissolve in water?

Hint: use the solubility chart.

• NaCl

• AgCl

• MgNO₃

• Na₂SO₄

Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?

• double replacement 
• decomposition 
• combustion 
• single replacement

Tags

NGSS.MS-PS1-2

Which of the below processes is evidence that a chemical reaction has occurred. 

• dissolving 

• melting

• formation of a gas

• bending

What type of chemical reaction is this: F₂ + NaBr --> NaF + Br₂

• single replacement 

• double replacement 

• combustion

• synthesis 

A single compound is reacted and produces two new substances. What type of reaction is this?

• combustion

• synthesis

• decomposition

• single replacement

What are the correct coefficients when this equation is balanced?
KClO₃  --> KCl  +  O₂

• 2,2,2
• 2,2,3
• 1,2,3
• 3,3,3

Tags

NGSS.HS-PS1-7

The starting materials in a chemical reaction are called

• Products

• Reactants

• Starters

• Enders

A substance that is formed as the result of a chemical reaction is called a ___

• Product

• Reactant

• Starters

• Enders