Molarity is more common because most solutions are made by measuring solutes by mass and then diluting a solution to the desired concentration with a liquid solvent. For typical lab use, it's easy to make and use a molar concentration. Use molarity for dilute aqueous solutions at a constant temperature. Molality is used when the solute and solvent interact with each other, when the temperature of the solution will change, when the solution is concentrated, or for a nonaqueous solution.
You would also use molality rather than molarity when you're calculating boiling point, boiling point elevation, melting point, or freezing point depression or working with other colligative properties of matter. Now that you understand what molarity and molality are, learn how to calculate them and how to use concentration to determine mass, moles, or volume of the components of a solution.
Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance. Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights. Measure content performance. Develop and improve products. List of Partners vendors. Share Flipboard Email. Viewed 21k times. Improve this question.
Atticusblink Atticusblink 3 3 gold badges 9 9 silver badges 21 21 bronze badges. Add a comment. Active Oldest Votes. Improve this answer. What do protons have to do with this considering this is regarding PH. Please also read the answer carefully, it's states multiple times that it is mole per litre. The unit litre may be written as L or l.
Most typefaces now try to have somewhat different forms for the digit 1 and the lowercase letter L. The digit 0 and the uppercase letter O are another problem.
It is defined as the moles of a solute per kilograms of a solvent. Molarity M is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution. An important distinction between molality and molarity is the difference between a solution and a solvent.
Molarity is the ratio of the moles of a solute to the total liters of a solution. The solution includes both the solute and the solvent. Molality, on the other hand, is the ratio of the moles of a solute to the kilograms of a solvent. Note that the mass used in the denominator is that of only the solvent, not the solute and the solvent.
0コメント