Lab 9 Salts and Solubility.docx - We can express...

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We can express concentrations in terms of moles solute per liters of solution Introduction When we cook pasta, we frequently dissolve table salt in water. Is there a limit to how much salt we can get into the water? When ionic-bonded compounds (like table salt, NaCl) are dissolved in polar solvents (like water), the polar water molecules act to pull the ions in the compound apart. When this happens (called dissociation), ions are released into the solution. Is there a limit to the number of ions that can exist in solution? Vocabulary Define the following terms: Saturated Holding as much moisture as possible ____________________ Unsaturated Capable of holding or dissolving more of a substance ________ Supersaturated Increasing the concentration of a substance past saturation point Molarity The concentration of a substance ________________________ Cation Positively charged ion _________________________________ Anion Negatively charged ion ________________________________ Dissociation Splitting a molecule into smaller molecules, by reversible process Solubility The ability to dissolve into a solvent ______________________ Procedure PhET Simulations Play With Sims Chemistry Salts and Solubility Take some time and familiarize yourself with the simulation before answering the below questions: 1. What happens to the bound Na+ and Cl- ions as they enter the water? They disperse evenly into the water, dissolving into it _______________________________ 2. Is there a point at which no more sodium and chloride ions will dissolve? How do you know?
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