List the three things that must happen in the solution process. Label the processes ΔHsolute, ΔHsolvent & ΔHhydration. Is energy gained or lost during those processes?
Why do ionic solutes dissolve in polar solvents but not in nonpolar solvent?
Draw water molecules around the substance below to show how the molecule will dissolve.
A solute dissolves in a solvent exothermically until the solution is saturated. What will happen if:
a. The Solution is stirred:
b. The solution is heated:
c. More Solute is added:
d. More Solvent is added:
e. The pressure above the solution is increased:
Describe how IMF influences
Using the solubility graph, how can you tell if a solution is
If the solution is saturated, the graph will show a point on or above the line. Any extra solute above the saturated line will be sitting at the bottom of the container, undissolved.
If the solution is unsaturated, the graph will show a point below the line.
If the solution is supersaturated, you cannot tell from the graph alone without additional information telling whether or not the additional solute is dissolved. To determine from the graph supersatured, there has to be a point above the line and information saying that all additional solute is dissolved.
Classify as to suspension, colloid or solution.
a. Homogenous, transparent
b. Particle size ranges from 1-1000 nm; Tyndall effect
c. Particles settle out due to gravity; can be separated by filtration
d. No Tyndall effect; cannot be separated by filtration
How many grams of calcium hydroxide are needed to make 100.0 mL of 250.0 mL of solution
What is the molarity of a solution containing 12.0g of sodium hydroxide in 250.0 mL of solution
If you dilute 175 mL of a 1.6 M solution of lithium chloride to 1.0 L, determine the new concentration of the solution
To 2.00 L of 0.445 M HCl, you add 3.88 L of a second HCl solution of an unknown concentration. The resulting solution is 0.974 M. Assuming the volumes are additive, calculate the molarity of the second HCl solution
What is the mole fraction of cinnamic acid in a mixture that is 50.0% weight urea in cinnamic acid ( urea= 60.06 g/mol; cinnamic acid= 148.16 g/mol)
How many grams of water must be used to dissolve 100.0 grams of sucrose (C12H22O11) to prepare a 0.020 mole fraction of sucrose in the solution?
A solution with a concentration of .14 M is measured to have an absorbance of 0.43. Another solution of the same chemical is measured under the same conditions and has an absorbance of 0.37. What is its concentration?
The absorptivity of a particular chemical is 1.5/ M˙cm. What is the concentration of a solution made from this chemical if a 2.0 cm sample had an absorbance of 1.20?