Second Semester Chemistry Exam Review Part 1

In a chemical equation, is it true that -

• the reactant side and product side can have different numbers of atoms for each element

• there can be different elements on the reactant side and the product side

• an element or compound must be accompanied by a phase change

• the coefficients indicate the number of moles of each reactant used and the number of moles of each product made

Which of the following models best demonstrates a balanced chemical equation?

• F

• G

• H

• J

The reactants are on the left side of the chemical equation.

• True

• False

All of the following reactions are correctly balanced except-

• A

• B

• C

• D

Which of these is NOT a sign that a chemical change has occurred?

• A loss of transparency

• An unexpected color change

• A temperature change

• The formation of a precipitate

AB + CD →AD + CB

• Double Replacement

• Single Replacement

• Synthesis

• Decomposition

Identify this type of reaction,
Cl₂ + 2KI _-->  I₂ + 2KCl

• Synthesis

• Single displacement

• Double displacement

• Decomposition

Which of the following is an example of synthesis?

• Na + Br₂ --> NaBr

• KClO₃ --> KCl + O₂

• HgO + Cl₂-->HgCl + O₂

• Cl₂ + NaBr --> NaCl + Br₂

2 AgNO₃ + Cu --> Cu(NO₃)₂ + 2 Ag 

• single displacement

• double displacement

• decomposition

• synthesis

The following is what type of reaction:
NH₃ + HCl  → NH₄Cl

• Synthesis

• Decomposition

• Single Replacement Replacement

• Double Replacement Replacement