PS: Chemical RXN TEST REVIEW

What are the steps to determine if a compound can be formed and if so, how to write the chemical formula correctly?

• Check to make sure one of the elements is not a noble gas; if it is then no compound can form

• Find each element on the periodic table and write the symbol and the charge

• Write the formula in reduced format (example Mg₂O₂ would be written MgO)

• Criss cross the charges and change them to subscripts on the opposite element.

Match type of reaction with the correct statements.

• Reaction of a metal with nonmetal

• Covalent Reaction

• Metal bonds with metal

• Ionic Reaction

• Nonmetals react with nonmetals

• Metallic Reaction

Consider chemical reactions between main group metals and non-metals. Based on known bonding patterns, which of the following compounds are possible?

• NaCl

• MgO

• Ca₃P₂

• CaCl₂

• NaO₂

Circle the noble gases.

Consider chemical reactions between main group metals and non-metals. Based on known bonding patterns, which of the following compounds are possible?

• K₃N

• KN

• NaS

• HeCl₂

• decomposition reaction

• double-displacement reaction

• single-displacement reaction

• synthesis reaction

• One reactants makes two or more products.

• C_xHy reacts with oxygen to make CO₂ and H₂O

• Two or more substances combine to form a single product.

• A metal or nonmetal replaces an ion in a compound to displace another metal or nonmetal.

The chemical reaction HCl + NaOH → is a double displacement reaction. What will the products be? Do not forget to find the charges of elements when you write the final equations.

• NaOH and HCl

• HNa and ClOH

• NaCl and H₂O

• NaCl and O₂H

Based on this chemical equation NaNO₃ --> NaNO₂ + O₂, please identify the kind of chemical reaction represented.

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

KNO₃ --> KNO₂ + O₂, why is this a decomposition reaction?

• Two reactants make one product

• Two compounds exchange ions or atoms to form two new compounds.

• A substance reacts rapidly with oxygen, releasing energy in the form of heat and light.

• A single compound breaks down into two or more simpler substances.

• A metal replaces another metal or a nonmetal replaces another nonmetal in a compound.