PreAp Chemistry Chemical Reactions by Rita Castillo

Chemical reactions create and break down..  

• chemical bonds
• atomic nuclei
• electrons
• proton orbitals

What order do you add coefficients in? 

• Oxygen and Hydrogen, Non-metals, Polyatomics, Metals
• Oxygen and Hydrogen, Non-metals, Metals, Polyatomics
• Metals, Polyatomics, Non-metals, Oxygen and Hydrogen
• Metals,Non-metals, Polyatomics, Oxygen and Hydrogen

Magnesium chloride reacts with phosphoric acid to produce magnesium phosphate and hydrochloric acid.

• 3MgCl2 + 2H3PO4 -> Mg3(PO4)2 + 6HCl
• 3MgCl2 + H3PO4 -> Mg3(PO4)2 + 6HCl
• MgCl2 + 2H3PO4 -> Mg3(PO4)2 + 6HCl

Synthesis, decomposition, and double replacement are all redox reactions.

• True
• False

Which chemical reaction switches only 1 cation?

• Double Replacement
• Single Replacement
• Combustion
• Synthesis

Hydrocarbon + Oxygen = Carbon Dioxide + Water

• Decomposition
• Combustion
• Single Replacement
• Double Replacement

_AgNO₃ + _Cu--->_Cu(NO₃)₂ + _Ag

•  2 AgNO₃ + 2 Cu---> 3 Cu(NO₃)₂ + 1 Ag
• 2 AgNO₃ + 1 Cu--->  1 Cu(NO₃)₂ + 2 Ag
• 1 AgNO₃ + 2 Cu--->2 Cu(NO₃)₂ + 1 Ag
•          3 AgNO₃ + 2 Cu--->3 Cu(NO₃)₂ + 2 Ag

In every balanced chemical equation, each side of the equation has the same number of ____.  

• coefficients
• moles
• molecules
• atoms of each element

N₂S₃ is properly named: 

• nitrogen sulfide
• nitrogen (II) sulfide
• nitrogen (II) sulfate
• None of the answers are correct

Which coefficients correctly balance the formula equation CaCO₃(s) → CaO(s) + CO₂(g)?

• 1,1,1
• 1,3,1
• 2,6,3
• 3,1,2