QUIZ! You may use your notes! Salt water is a solution. In this solution the solute is 1._____________________ and the solvent is 2._____________________ 3. If 22.5g of NaCl is dissolved in 4.2L of distilled water, what is the molarity of the solution? 4. If 22.5 g of NaCl was used to get a molarity of.1M (molarity) how many liters of water would need to be added?

Review concepts  Solution examples:  What are the solutes and solvents  Solubility- The maximum amount of substance that will dissolve at that temperature (usually g/L).  solubility(S) & pressure (P) for gases  S 1 /P 1 =S 2 /P 2 #55  Saturated solution- Contains the maximum amount of solid dissolved.  Unsaturated solution- Can dissolve more solute.  Supersaturated- A solution that is temporarily holding more than it can

 Dilute vs. concentrated solutions  Molartiy  Equation  Dilution  M 1 x V 1 = M 2 x V 2  M:molarity & V:volume

 2.0 L of a 0.88 M solution are diluted to 3.8 L. What is the new molarity?  Need 450 mL of 0.15 M NaOH. All you have available is a 2.0 M stock solution of NaOH. How do you make the required solution?

Solutions Stations Activities  Be sure to only taste station #1. No other labs are to be digested in any way.  Be sure to understand each station. Please let me know if you have questions or concerns.

Homework Time  This is a flipped classroom so along with activities we also must get homework done. These are the problems that are expected to be completed by the end of class today.  P 548 #55, 58, 59, 60a&b, 75, 87, 96a&b

Mole Fraction  X=Moles of Component Total Moles l So total of a solution is always = 1 l What is the mole fraction of salt water made with moles of NaCl and moles of water?