HN HW: Solutions

Master chemistry solutions, molarity, and dilution! Practice identifying electrolytes and colligative properties.

1. If a solute cannot dissolve in the solvent, then it is considered to be unsaturated soluble insoluble solute 2. If a solution contains more dissolved solute than the solvent can contain, then it is supersaturated saturated unsaturated insoluble 3. Potassium nitrate was dissolved in water. Potassium nitrate is considered to be the solution solute solvent 4. Calculations Type your answer with the units in the right column. Problem Answer Superman needed to make 250. mL of 0.750 M solution of Ca(OH)2. Determine the mass he needs in order to make this solution. 13.9 g What is the final concentration if 80.0 mL of a 4.00 M solution is diluted to 200.0 mL? 1.60 M How much water is needed to make a 4.00 M solution from 50.0 mL of 12.0 M hydrochloric acid? 100. mL 5. Lab Scenario Determine the volume I need in order to dilute a 5.0 M solution to make 400 mL of a 2.5 M solution. Describe how I would make this solution in the lab. 6. Electrolytes Which ones are strong electrolytes and which ones are non-electrolytes? Strong Electrolytes Be(NO3)2 NH4F PtCl2 Ag3N K2S Non-Electrolytes CO2 N2F4 SF6 C6H12O6 7. Dissociation For each strong electrolyte in question #6, determine how many moles of particles it will dissociate into.Write it in this format: NaCl - 2 moles of particles 8. Colligative Properties Which salt should be added to roads in the winter to prevent icing, NaCl or CaCl2? Explain your answer.