CP U12 Solutions

Front

What is molarity?

Back

Molarity (M) is a measure of concentration defined as the number of moles of solute per liter of solution.

Front

How do you calculate the molarity of a diluted solution?

Back

Molarity (M) = (Molarity of concentrated solution) x (Volume of concentrated solution) / (Total volume of diluted solution)

Front

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250 mL?

Back

0.636 M

Front

What happens to the number of particles when a molecular compound like CH3OH dissolves in water?

Back

It remains as one particle because it does not dissociate into ions.

Front

What is a non-electrolyte?

Back

A non-electrolyte is a substance that does not dissociate into ions in solution and therefore does not conduct electricity.

Front

Which of the following is a non-electrolyte: CaO, NaOH, BaCl2, Br2?

Back

Br2 is a non-electrolyte.

Front

What is a precipitate?

Back

A precipitate is an insoluble solid that forms when two solutions are mixed.

Front

Which reaction does NOT form a precipitate: Pb(NO3)2(aq) + 2KI(aq) →, Sr(NO3)2(aq) + K2SO4(aq) →, AgNO3(aq) + Na2S(aq) →, Pb(NO3)2(aq) + AgNO3(aq) →?

Back

Pb(NO3)2(aq) + AgNO3(aq) → does NOT form a precipitate.

Front

What factors can increase the rate of dissolution of a solid in a liquid?

Back

Stirring, increasing temperature, and increasing surface area of the solid.

Front

What should be done to make a powder dissolve faster in a liquid?

Back

Stir the powder in the liquid.