± PhET Simulation-Concentration Solutions consist of a solute dissolved into a s
ID: 1010032 • Letter: #
Question
± PhET Simulation-Concentration Solutions consist of a solute dissolved into a solvent, eg, a salt dissolved in water. There is often a need to quantify how much solute is present per unit solution volume. Concentration is most commonly expressed in terms of molarity (as molar or M), which is the number of moles (mol) per liter (L) of solution. A one molar solution can be expressed as follows: 1 L Every solute is limited in how much of can be dissolved into solution at a given temperature and pressure. These limitations exist because of the nature of dissolution, which involves the interaction between solute and solvent molecules. The point at which no more solute can be dissoved into solution is called the "saturation point, and the concentration at which it occurs is considered the compound's solubility. If too much solute is added to a solution, the concentration must be diluted by adding more solvent, or the saturation point must be raised by appropriately adjusting the temperature and sometimes the pH. A solution can be considered "dilute" when the concentration is less than half of the saturation point for the conditions, but dilute is a qualitative description that has no fixed definition. Click on the image below to explore this simulation, which shows how concentration is affected by various processes. When you click the simulation link, you may be asked whether to run, open, or save the file. Choose to run or open it Souse | Drink mix @sold Souton 1 L Evaporation filed to Lwith water You can select a solute using the Solute When the simulation is opened, you will see a container dropdown menu, and add it as a solid or conce meter menu, and add it as a solid or concentration solution (using the respective radio butons). The Concentration can be dragged (both the display and the sensor) to anywhere in the simulation, but the sensor must be submerged in mixture to read the concentration. You can also add water and remove the mixture using the respective taps and evaporate the mixture using the Evaporation scale bar Part A Use the PhET simulation to identify what happens to the concentrations of a d mix solution for t adding Drink mix to the container as a Solution (radio button in the upper right area of the simulation). Note that the Concentration meter can be placed toward the bottom of the container or in the stream of the Drink mix the PhET simulation to identify what happens to the concentrations of a dilute Drink mix moture or a pure Drink the following scenarios. A pure Drink mix solution can be obtained by draining all the mixture, thenExplanation / Answer
Molarity = mass of solute/Molar mass of solute * 1000/volume of solution
M = 429 * 10^-3/182.94*1000/250
M = 9.38*10^-3 mol/L
M = m/MW*1000/V
0.156 = m/35.45*1000/100
m = 0.553 g
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.