Solubility Curve Calculations - Straight Science

Hi guys! Hope all is well. In this video, we go over the three main types of questions you can be asked about a solubility curve and how to solve each one. Type #1: Just reading the graph (EASY!) These questions will simply ask you how many grams of a specific solute can be dissolved at a given temperature. They might also ask you to identify if a given amount of dissolved solute would make that solution saturated, unsaturated, or supersaturated. Easy identifying the graph problems. Type #2: Simple calculations with 100g of H2O (MEDIUM) These questions will have you do simple math to try and figure out how many more grams of a solute can be dissolved until it hits saturation, or how many grams of solute are dissolved over the saturation line. All these problems are still looking at scenarios using 100 grams of H2O as your solvent, so the math is super simple. Type #3: Calculations with a DIFFERENT amount of H2O than 100g (HARDEST) These questions will ask you to solve for an amount of dissolved solute in a quantity of water that is NOT 100 grams. This means you'll have to set up a proportion to determine how many grams of your solute you can dissolve in the new amount of solvent. The proportion is easy -- you just have to understand how to do it. Hope this helps! Make sure you remember that substances that increase in solubility with an increase in temperature are solids, and those that decrease in solubility are gases. Good luck!!