AP Chemistry Unit 4 Review

Front

What is a precipitate?

Back

A precipitate is a solid that forms and separates from a liquid mixture during a chemical reaction.

Front

What is the solubility rule for lead (II) chloride?

Back

Lead (II) chloride (PbCl2) is insoluble in water, meaning it will form a precipitate when lead (II) ions react with chloride ions.

Front

What is the balanced equation for the reaction of sodium and zinc iodide?

Back

2Na + ZnI2 → 2NaI + Zn.

Front

What is a conjugate base?

Back

A conjugate base is the species that remains after an acid donates a proton (H+). For example, the conjugate base of H2SO4 is HSO4-.

Front

What is the role of NaOH in the reaction with FeCl3?

Back

NaOH provides hydroxide ions (OH-) that react with Fe3+ ions to form the precipitate Fe(OH)3.

Front

What is the difference between soluble and insoluble compounds?

Back

Soluble compounds dissolve in water, while insoluble compounds do not dissolve significantly and may form precipitates.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures that the law of conservation of mass is obeyed, meaning the number of atoms of each element is the same on both sides of the equation.

Front

What is the formula for lead (II) nitrate?

Back

The formula for lead (II) nitrate is Pb(NO3)2.

Front

What is the formula for sodium chloride?

Back

The formula for sodium chloride is NaCl.

Front

What is the precipitate formed when mixing silver nitrate and sodium sulfide?

Back

The precipitate formed is silver sulfide (Ag2S).