Introduction to Solutions

Using Table F, determine the solubility of the following substances.

Groups:

(a) Soluble (aqueous)

,

(b) Insoluble (solid)

• KCl

• (NH₄)₂S

• CaCrO4

• BaSO₄

• Ag₂CrO₄

• PbCl₂

• Pb(NO₃)₂

• Fe(OH)₃

• CaCO₃

• AgNO₃

In an aqueous solution of potassium chloride, the solute is

• H₂O

• Cl

• KCl

• K

When calcium chloride is dissolved in water, to which end will an adjacent water molecule attract the calcium ion?

• the oxygen end, which is the negative pole

• the oxygen end, which is the positive pole

• the hydrogen end, which is the negative pole

• the hydrogen end, which is the positive pole

A bottled water label lists the ions dissolved in the water.  The table below lists the mass of some ions dissolved in a 500.-gram sample of the bottled water.

Based on Table F, write the formula of the ion in the bottled water table that would form the least soluble compound when combined with the sulfate ion.

• Ca⁺²

• Na⁺

• Mg⁺²

• HCO₃^-1

According to Reference Table G, how many grams of HCl are needed to saturate 50 grams of water at 70⁰C

• 104 g

• 52 g

• 48 g

• 26 g

What is a solvent?

• The substance that does the dissolving in a solution.
• The substance that is being dissolved in a solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

You are given a small beaker of solution at room temp. You add a bit of solute to the solution and it dissolves. The solution was:

• saturated

• unsaturated

• concentrated

• supersaturated

Based on molecular polarity, identify the sample that would dissolve in water?

• CH₄

• N₂

• CO₂

• HCl

Which of the following would have the fastest rate of dissolving?

• a sugar cube in hot water
• a sugar cube in cool water
• powdered sugar in hot water
• powdered sugar in cool water

Tags

NGSS.HS-PS1-5

A student prepares a saturated solution of potassium nitrate in water at 25°C. Solid potassium nitrate remains at the bottom of the container. The solution is left undisturbed at constant temperature.

Which statement best explains what is happening at the particle level?

• Dissolving has stopped completely because the solution cannot dissolve any more solute.

• Solute continues to dissolve, but no dissolved particles recrystalize.

• The rate at which the solute dissolves equals the rate at which dissolved ions recrystallize.

• The concentration of dissolved solute is increasing slowly over time.