Chemistry Unit 5 Review Parts 1 & 2

Sodium iodide reacts with lead (II) nitrate to produce sodium nitrate and a solid. The equation for the reaction is: 2NaI (aq) + Pb(NO3)2 (aq) → 2 NaNO3 (aq) + unknown solid?

• Pb2I

• PbI2

• Pb

• I2

Which of the following is NOT a sign that a chemical reaction occurred?

• A. Temperature stays the same.

• B. Temperature changes

• C. Color changes

• D. Gas bubbles

What are the missing coefficients for the skeleton equation below? _____AlCl3 + _____ NaOH → _____ Al(OH)3 + _____ NaCl

• 1,3,1,3

• 3,1,3,1

• 1,1,1,3

• 1,3,3,1

Which of the following is NOT a true statement concerning all chemical reactions?

• Mass is conserved.

• New atoms are formed as products.

• The bonds of the reactants are broken and new bonds are formed to create the products.

• In an equation representing a chemical reaction, the reactants are written on the left and the products on the right.

Magnesium metal and hydrochloric acid react to form magnesium chloride and a gas. The equation for the reaction is: Mg (s) + 2HCl (aq) → MgCl2 (aq) + unknown gas?

• H

• H2

• Cl2

• Mg

The following equation is balanced. Identify the type of reaction.

_____C3H8   +   ___5__O2  🡪   __3___CO2   +   ___4__H2O

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion

The following equation is balanced. Determine the type of reaction.

__2___ AgNO3   +   _____H2S  🡪   _____Ag2S   +   ___2__HNO3

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion

The following equation is balanced. Determine the type of reaction.

___2__K   +   ___2__H2O  🡪   ___2__KOH   +   _____H2

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion

The following equation is balanced. Determine the type of reaction.

___2__KClO3   🡪   ___2__KCl   +   ___3__O2

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion

The following equation is balanced. Determine the type of reaction.

___4__ Fe   +    ___3__O2   🡪   ___2__Fe2O3

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion